If you’re looking for the top robot window cleaners, there are some fantastic options combining smart navigation, powerful suction, and water spray tech. Models like ECOVACS WINBOT series, W2 PRO, and others feature advanced sensors, ultrasonic spray, and safety features that make cleaning effortless and streak-free. Whether for large glass, mirrors, or high-rise windows, these robots deliver spotless views. Keep going, and you’ll discover which models fit your needs perfectly.
Key Takeaways
- Advanced navigation and obstacle detection ensure thorough, streak-free cleaning of various window types and surfaces.
- Many models feature powerful suction, water spray technology, and microfiber pads for deep dirt removal.
- Safety features like anti-fall sensors, backup batteries, and safety ropes make high-rise window cleaning secure.
- Compact, lightweight designs and multiple power options provide ease of use inside and outside windows.
- Suitable for different surfaces, including framed, frameless, textured, and mirror surfaces, ensuring spotless views.
Automatic Window Cleaning Robot with Dual Spray, 3000Pa Suction, Remote Control, Edge Detection, 2025 Model
If you’re looking for a window cleaner that combines smart technology with powerful performance, the Automatic Window Cleaning Robot with Dual Spray, 3000Pa Suction, and Edge Detection is an excellent choice. This 2025 model uses AI 5.0 path planning, intelligent sensors, and edge detection to clean efficiently and streak-free. It detects window frames and obstacles, adjusting its direction seamlessly to cover every corner. Equipped with dual water nozzles, double helix cleaning heads, and microfiber pads, it delivers deep, thorough cleaning. Controlled remotely with multiple modes, it’s versatile and easy to operate, ensuring spotless windows every time.
Best For: Homeowners and cleaning professionals seeking an advanced, efficient window cleaning solution with smart technology and deep cleaning capabilities.
Pros:
- Incorporates AI 5.0 path planning and intelligent sensors for precise, streak-free cleaning.
- Equipped with dual spray nozzles, double helix cleaning heads, and microfiber pads for thorough dirt removal.
- Remote control with multiple cleaning modes offers versatile, user-friendly operation.
Cons:
- Higher initial cost compared to basic window cleaning tools.
- May require regular maintenance of water nozzles and sensors.
- Effectiveness can be limited on very large or heavily textured glass surfaces.
ECOVACS WINBOT Mini Window Cleaning Robot
The ECOVACS WINBOT Mini stands out for those needing a compact, highly maneuverable window cleaner that fits into tight spaces. Its slim design lets it access small, narrow, frameless, tilting, and handle-adjacent windows with ease. Ideal for windows under 30cm in side length, it uses ultrasonic water spray to atomize water into a fine mist, removing tough stains efficiently and streak-free. The device’s 9-stage safety system guarantees secure operation, while WIN-SLAM 3.0 navigation intelligently plans paths, avoids obstacles, and covers edges thoroughly. With three cleaning modes—Fast, Thorough, and Spot—it adapts to various cleaning needs effortlessly.
Best For: those with small, narrow, frameless, or tilting windows seeking a compact, efficient, and safe window cleaning solution.
Pros:
- Slim, compact design suitable for tight and hard-to-reach spaces
- Ultrasonic water spray provides streak-free, gentle cleaning with minimal water usage
- Advanced WIN-SLAM 3.0 navigation and 9-stage safety system ensure thorough and secure operation
Cons:
- Designed for windows with side length less than 30cm, limiting larger surface coverage
- May require careful positioning for handles spaced 50-80mm from glass
- Limited to certain window types, may not work well on heavily textured or uneven surfaces
Smart Window Cleaning Robot with Ultrasonic Spray and 85ml Tank
For anyone seeking a highly efficient and hands-free window cleaning solution, the Smart Window Cleaning Robot with Ultrasonic Spray and 85ml Tank stands out. It uses bidirectional ultrasonic atomization to spray water evenly, delivering streak-free results without manual effort. Its large 85ml tank sprays twice per movement, ensuring extensive coverage, while edge detection prevents surface damage. With strong suction (2400-3200pa), it cleans deeply without scratching glass. Features like anti-drop sensors, AI edge detection, low noise operation, and remote control make it easy to use and reliable. This lightweight, durable robot is perfect for large windows, offering a spotless view every time.
Best For: homeowners and professionals seeking an efficient, hands-free solution for cleaning large, hard-to-reach windows and glass surfaces with minimal effort.
Pros:
- Ultrasonic bidirectional spray provides streak-free, thorough cleaning without manual scrubbing.
- Strong, adjustable suction (2400-3200pa) ensures deep cleaning and prevents falls or surface damage.
- Intelligent edge detection and obstacle navigation make operation safe and easy on various surfaces.
Cons:
- Slightly limited water capacity (85ml tank) may require refilling during extensive cleaning sessions.
- Occasional difficulty in reaching corners and non-rectangular surfaces due to sensor limitations.
- Higher initial cost compared to traditional cleaning methods, though offset by convenience.
ECOVACS WINBOT W2 PRO Portable Window Cleaning Robot
The ECOVACS WINBOT W2 PRO Portable Window Cleaning Robot stands out with its dual power modes, making it an ideal choice for those needing flexible cleaning options. You can operate it on battery for up to 110 minutes, perfect for small or balcony windows, or plug it in for continuous cleaning of larger surfaces. Its multi-functional 6-in-1 station simplifies setup and enhances safety, while the advanced water spray system ensures thorough dirt removal with increased water pressure. Thanks to WIN-SLAM 4.0 navigation, it cleans efficiently across various window types. Plus, a robust 12-stage safety system and insurance protection give you peace of mind during operation.
Best For: homeowners or cleaning professionals seeking a versatile, efficient, and safe window cleaning robot capable of handling various window sizes and types with flexible power options.
Pros:
- Dual power modes (battery and plugged-in) offer flexible operation for different window sizes and locations
- Multi-functional 6-in-1 station simplifies setup, enhances safety, and consolidates essential functions
- Advanced water spray technology with increased pressure and spray duration ensures thorough cleaning in a single pass
Cons:
- Battery life may be limited for very large or extensive window surfaces without being plugged in
- Reliance on sophisticated navigation and safety systems may require initial setup and familiarization
- Higher price point compared to basic window cleaning devices, reflecting its advanced features
ECOVACS Winbot W1 Pro Window Cleaning Robot
If you’re looking for a reliable window cleaning robot that combines advanced technology with user-friendly features, the ECOVACS Winbot W1 Pro stands out. This sleek grey device measures just over 10 inches in each dimension and weighs only 3.3 pounds, making it easy to handle. It operates with corded power and includes four lithium-ion batteries for added convenience. The W1 Pro uses powerful 2800Pa suction to attach securely to windows, while dual water spray technology guarantees effective cleaning. With app control, edge detection sensors, and safety features, it delivers thorough, reliable cleaning, even on frameless glass.
Best For: homeowners and cleaning professionals seeking a reliable, advanced window cleaning robot with safety features and app control for frameless and glass surfaces.
Pros:
- Strong 2800Pa suction power ensures secure attachment and effective cleaning.
- Dual water spray technology provides consistent humid mopping for stubborn stains.
- App control and edge detection sensors enable precise, thorough cleaning with minimal manual effort.
Cons:
- The device’s corded operation may limit mobility compared to cordless models.
- Customer ratings average 3.9 out of 5 stars, indicating some users may experience inconsistent performance.
- The relatively high price point might be a consideration for budget-conscious buyers.
Tosima W2 Window Cleaner Robot with Intelligent Path Planning
The Tosima W2 Window Cleaner Robot stands out for its intelligent path planning, making it an ideal choice for homeowners seeking thorough and efficient cleaning. Its advanced sensors and AI 3.0 technology enable precise navigation across various surfaces, ensuring no spot is missed. Its sleek, compact design easily reaches tight corners and edges, while its 3800Pa suction power and microfiber pads deliver streak-free results on windows, mirrors, and glass doors. Multiple cleaning modes cater to different needs, and safety features like anti-fall sensors keep it stable on vertical surfaces. Lightweight and easy to operate, the Tosima W2 offers convenience and effective cleaning in one smart package.
Best For: homeowners and cleaning enthusiasts seeking an efficient, thorough window cleaning solution with smart navigation and safety features.
Pros:
- Advanced sensors and AI 3.0 technology ensure precise and comprehensive cleaning coverage
- Compact, sleek design easily reaches tight corners and edges for thorough results
- Multiple cleaning modes and adjustable settings cater to various surfaces and preferences
Cons:
- Limited battery life of 25 minutes may require multiple sessions for large windows
- Heavier weight (4 pounds) could be slightly cumbersome for some users to handle repeatedly
- Compatibility is primarily with Windows devices, possibly limiting remote control options for some users
For homeowners seeking a high-performance window cleaning robot, the S7 Window Cleaning Robot by HUTT stands out with its powerful 5500Pa suction and advanced SLAM 4.0 navigation. Its 3D floating chassis ensures stability on various glass surfaces, while the all-in-one storage box with eight cloths simplifies cleaning. Equipped with HydroJet water spray technology, it atomizes water every five seconds for thorough washing. The robot’s precise SLAM 4.0 navigation, combined with safety features like a safety rope and backup battery, guarantees safe, efficient operation. Control options include an app, touch interface, and remote, making it easy to achieve spotless windows effortlessly.
Best For: homeowners and cleaning professionals seeking an efficient, safe, and easy-to-use window cleaning robot for various glass surfaces and windows.
Pros:
- Powerful 5500Pa suction ensures thorough cleaning and debris removal
- Advanced SLAM 4.0 navigation provides precise, obstacle-aware movement on frameless and framed windows
- Multi-layer safety features, including backup battery and safety rope, guarantee secure operation and emergency support
Cons:
- Battery life of approximately 30 minutes may require recharging for larger windows
- 12V battery is not included, adding to the initial setup cost
- Relies on app and remote control which may require some familiarity for optimal use
Window Cleaner Robot with Strong Suction and Remote Control
A window cleaner robot with strong suction and remote control is an excellent choice for anyone seeking efficient, hands-free cleaning of high or hard-to-reach glass surfaces. With 5600Pa of suction, it securely adheres to windows, while the remote lets you control cleaning modes or manually maneuver it. Its double spiral cleaning head efficiently covers large glass panels, cleaning 1m² in just 4 minutes. Lightweight and portable, it comes with safety features like an anti-fall algorithm, backup power, and a high-strength lanyard. Perfect for inside and outside windows, it combines powerful performance with ease of use, though supervision is recommended to prevent falls.
Best For: homeowners, property managers, or maintenance professionals seeking an efficient, hands-free solution for cleaning high or hard-to-reach glass surfaces, especially in high-rise buildings.
Pros:
- Strong 5600Pa suction ensures secure adhesion to windows during operation
- Equipped with remote control and multiple auto cleaning modes for versatile use
- Lightweight, portable design with safety features like backup power and anti-fall algorithms
Cons:
- May require supervision to prevent falls or unexpected stops during cleaning
- Not suitable for heavily soiled, cracked, or textured surfaces such as black grout
- Limited manual override options; device stops automatically and cannot be manually controlled directly
SqueeGBot Window Cleaning Robot with AI Navigation and Water Spraying
If you’re looking for a window cleaner that handles large, high surfaces with ease, the SqueeGBot Window Cleaning Robot is an excellent choice. It’s designed for panoramic windows, mirrors, tiles, and shower glass, using AI 5.0 navigation to clean efficiently. With water spraying and suction up to 5300 Pa, it’s perfect for big windows and high-rise buildings. Its smart docking station allows for quick setup, and the remote control makes operation simple. Compact and lightweight, it features a backup lithium-ion battery for safety during power loss. Overall, it’s a versatile, cost-effective solution for streak-free, spotless views.
Best For: homeowners and high-rise residents seeking efficient, streak-free cleaning of large, high, and hard-to-reach windows, mirrors, and glass surfaces.
Pros:
- Efficient AI 5.0 navigation for thorough cleaning of large and high surfaces
- Water spraying and strong suction (up to 5300 Pa) for spotless results
- Quick setup with smart docking station and remote control for easy operation
Cons:
- Operates corded, requiring proximity to power outlets, which may limit placement
- Potential vacuum stability issues on frameless or rounded glass surfaces
- Slightly heavy at 11.05 pounds, which may affect portability during handling
CL3 Window Cleaner Robot with Dual Water Spray
The CL3 Window Cleaner Robot with Dual Water Spray stands out for its dual-side water outlets, ensuring thorough coverage without water spilling onto windowsills. Its sleek design weighs just under 5 pounds and features smart navigation, edge detection, and AI to detect frames and obstacles. It uses powerful suction and provides an extra 30 minutes of backup power, making it suitable for cleaning large windows up to 30㎡. The robot sprays water evenly from upgraded outlets, leaving glass streak-free when used correctly. Controlled via remote, it’s easy to operate, with washable microfiber pads and extra wheels included. It’s perfect for high or hard-to-reach windows, delivering spotless, streak-free results.
Best For: homeowners and commercial spaces seeking efficient, streak-free window cleaning on large, high, or hard-to-reach glass surfaces with minimal effort.
Pros:
- Effective dual-water outlets ensure comprehensive cleaning coverage without water spillage.
- Smart navigation and AI features provide thorough, automatic cleaning with minimal manual intervention.
- Reusable microfiber pads and extra wheels reduce ongoing maintenance costs and simplify setup.
Cons:
- Noise level can be high during operation, which may be disruptive.
- May struggle with corners and edges due to round pads, possibly leaving minor streaks.
- Water spray strength can be weak; manual misting may be necessary for optimal results.
Window Cleaning Robot with Auto-Spray and AI Edge Detection
For anyone seeking a highly efficient window cleaner, the Jemyths YW160-YX with Auto-Spray and AI Edge Detection stands out. Its double nozzles deliver a uniform spray of 70ml water, covering up to 40m² and dissolving dirt effectively, reducing water refills. With 2800Pa suction power, it easily removes stubborn stains without leaving water marks on smooth surfaces. The AI-powered edge detection and path planning ensure thorough coverage while avoiding obstacles. Easy to operate via remote control, it’s perfect for all users, including the elderly. Its safety features, like outage protection and safety ropes, make cleaning safer and more reliable.
Best For: homeowners and elderly users seeking an efficient, easy-to-use window cleaning robot with minimal manual effort.
Pros:
- Effective cleaning with uniform spray and powerful suction, suitable for smooth surfaces.
- AI edge detection and path planning ensure thorough coverage and obstacle avoidance.
- Remote control operation is simple and elderly-friendly, with safety features for reliable use.
Cons:
- Setup of safety ropes can be challenging on narrow or irregular window frames.
- Occasional stops or incomplete cleaning may require manual reoperation.
- Performance may diminish with dirty pads, necessitating regular replacement or cleaning.
Window Cleaning Robot with Water Spray and Remote Control
A window cleaning robot with water spray and remote control is ideal for anyone seeking effortless, thorough cleaning of large or hard-to-reach glass surfaces. I find the KADSKAN HCR-10 perfect for this, with its strong 5600Pa suction and dual water spray modes. The remote control makes it easy to operate from afar, while the double spiral cleaning head ensures deep cleaning without scratches. Its safety rope prevents falls, and the robot handles most glass surfaces effectively. While it’s great for big windows and shower doors, the reservoir’s small size limits extended use. Overall, it offers a convenient, efficient way to keep windows spotless with minimal effort.
Best For: homeowners and cleaning professionals seeking effortless, thorough cleaning of large or hard-to-reach glass surfaces indoors and outdoors.
Pros:
- Powerful 5600Pa suction system ensures secure attachment and effective cleaning
- Dual water spray modes provide flexible cleaning options for different surfaces
- Remote control allows easy operation from a distance, saving time and effort
Cons:
- Small reservoir capacity limits extended cleaning sessions on large surfaces
- Less effective on unframed windows and in corners, requiring manual touch-ups
- Some users report streaking or minor smears if cleaning cloths are not wetted properly
Window Cleaning Robot with 3000Pa Suction & Ultrasonic Spray
If you’re looking for a window cleaning robot that handles high windows effortlessly, this model with 3000Pa suction and ultrasonic spray is a top choice. It cleans 40% faster, covering 1 square meter in just 4 minutes, saving you time. Its advanced AI navigation guarantees efficient movement, reducing effort and maximizing coverage. With one-touch operation and simple attachment, it’s perfect for all users, including seniors. The powerful suction and 157-inch safety rope enable ladder-free cleaning of tall windows up to 157 inches. Plus, the dual ultrasonic nozzles deliver ultra-fine mist for streak-free results, making it a versatile, safe, and effective cleaning solution.
Best For: homeowners and property managers seeking a safe, efficient, and easy-to-use solution for cleaning high or hard-to-reach windows without ladders or manual effort.
Pros:
- Cleans 40% faster, saving time on window maintenance
- Equipped with powerful 3000Pa suction and safety rope for ladder-free cleaning of tall windows up to 157 inches
- Uses ultrasonic spray technology for streak-free, stain-dissolving cleaning on various surfaces
Cons:
- May require initial setup and familiarization with navigation features
- Limited to surfaces compatible with ultrasonic mist and suction technology
- Battery backup lasts only 20 minutes, which might be insufficient for very large cleaning tasks
FMART W7 Window Cleaning Robot with Water Spray and Edge Detection
The FMART W7 Window Cleaning Robot stands out for its advanced water spray system and precise edge detection, making it ideal for those who want a thorough clean without constant supervision. It uses dual 60ml water tanks and sprayers to evenly mist dirt, while powerful suction keeps it securely attached to glass surfaces. Its AI navigation follows an intelligent Z-N path, and sensors detect edges to prevent falls, even during power loss. The robot’s compact design and voice-guided one-touch operation make it user-friendly. Perfect for indoor and outdoor high-rise windows, it helps me maintain spotless views, though performance may vary in windy conditions.
Best For: homeowners and high-rise residents seeking an efficient, hands-free solution for cleaning large or hard-to-reach windows indoors and outdoors.
Pros:
- Powerful suction and edge detection ensure secure attachment and safe operation on glass surfaces.
- Dual water tanks and automatic spray provide even, streak-free cleaning with minimal effort.
- Voice-guided one-touch operation simplifies use, suitable for users of all tech levels.
Cons:
- Performance may be affected by windy outdoor conditions, reducing water spray effectiveness.
- No internal battery, risking falls during power outages unless connected to a stable power source.
- Limited support responsiveness and occasional push button malfunctions reported by users.
Factors to Consider When Choosing Robot Window Cleaners
When selecting a robot window cleaner, I consider factors like whether it works well on my specific surfaces and how safe it is to use. I also look at its navigation abilities, water spray performance, and battery life to guarantee it gets the job done efficiently. These points help me choose a model that’s reliable and suits my cleaning needs.
Cleaning Surface Compatibility
Choosing a robot window cleaner requires careful attention to surface compatibility to guarantee it works effectively and safely on your specific windows. First, check if the device supports your window type, whether frameless, framed, or textured surfaces. Some robots can also handle other materials like mirrors, tiles, or glass doors, which is useful if you want versatility. It’s important to verify the maximum surface area the robot can clean efficiently to avoid missed spots. Additionally, examine the suction power and stability features to prevent slips or falls, especially on uneven or slick surfaces. Look for models with adjustable settings or sensors that can adapt to surface irregularities or delicate surfaces, ensuring a thorough clean without damage. Proper compatibility is key for safe, effective, and fuss-free window cleaning.
Safety Features Importance
Ensuring safety features are in place is crucial when selecting a robot window cleaner, especially for high or hard-to-reach windows. These features prevent accidents and protect your property. Anti-fall sensors and emergency backup power are essential, as they help avoid dangerous falls if power is lost or if the robot encounters issues. Strong suction power and edge detection technology keep the device securely attached and ensure precise navigation, reducing slip risks. For outdoor or large windows, safety ropes or harness systems add an extra layer of protection. Protective systems that automatically detect obstacles and frame edges minimize damage and detachment risks during operation. Devices with extensive safety features are especially important for high-rise or frameless windows, where manual rescue or damage control is more complicated.
Navigation and Mapping
Effective navigation and mapping are essential for robot window cleaners to do a thorough job without missing spots or wasting time. Advanced sensors and AI path planning help the robot detect window frames, obstacles, and edges, allowing it to adjust its route in real-time for maximum efficiency. Precise mapping guarantees the cleaner avoids areas already covered, saving time and energy. Multi-directional navigation, like bidirectional movement or SLAM technology, enhances coverage on complex or irregularly shaped windows. Accurate mapping and obstacle avoidance are critical, especially on frameless or delicate glass surfaces, preventing falls or collisions. When choosing a robot window cleaner, consider models with these features to ensure comprehensive, efficient, and safe cleaning performance. Proper navigation makes all the difference in achieving spotless views.
Water Spray Effectiveness
Have you ever wondered how well a robot window cleaner’s water spray can actually remove dirt and streaks? The key lies in the nozzle design, spray volume, and atomization quality. Ultrasonic or fine mist systems, usually between 12μm spray particles and a 70ml tank, provide even coverage that enhances cleaning performance on glass surfaces. Some models feature dual nozzles or adjustable spray modes, allowing targeted cleaning for stubborn stains and reducing water waste. Proper water pressure and consistent spray are essential to dissolve dirt effectively without leaving drips, streaks, or water marks. External factors like wind or the angle of the surface can influence spray efficiency, so choosing a system with adjustable settings helps guarantee ideal cleaning regardless of conditions.
Power and Battery Life
When choosing a robot window cleaner, considering its power and battery life is vital for efficient performance. Longer battery life lets it cover larger surfaces or run longer without needing a recharge, saving time and effort. High-capacity batteries ensure consistent suction and spray power throughout the entire cleaning cycle, preventing spots and streaks. Quick recharge times reduce downtime between sessions, boosting productivity. Battery backup features are also essential, especially during power outages or interruptions, as they help prevent accidental falls or incomplete cleaning. Additionally, deciding between rechargeable batteries and corded power affects portability and continuous operation—rechargeable units offer greater mobility, while corded models provide uninterrupted power. Ultimately, a reliable power source ensures thorough, hassle-free cleaning.
Ease of Operation
Choosing a robot window cleaner that’s easy to operate can make a big difference in your overall experience. I look for models with intuitive controls, like one-touch start or remote operation, so I don’t waste time figuring things out. Clear instructions and user-friendly interfaces give me confidence to use the device without needing extensive training. Features like automatic path planning and obstacle detection simplify navigation, reducing manual adjustments. Safety is also vital—automatic fall prevention and backup power keep operation safe and worry-free. Additionally, compatibility with voice prompts, app control, or remote controls makes handling the cleaner convenient, especially for multi-story windows. An easy-to-use robot not only saves time but also ensures a hassle-free cleaning process every time.
Frequently Asked Questions
How Long Does a Typical Window Cleaning Robot Operate per Charge?
A typical window cleaning robot operates for about 45 minutes to an hour per charge. I’ve noticed that most models can handle a standard-sized window within this time, but larger or more stubborn spots might take a bit longer or require a second run. It’s always a good idea to check the specific battery life for the model you’re interested in, as it varies between brands and features.
Are Robot Window Cleaners Safe for All Window Types and Coatings?
Did you know that over 85% of window coatings are compatible with robot cleaners? I believe robot window cleaners are generally safe for most window types and coatings, but it’s crucial to check the manufacturer’s recommendations. I always make sure my robot is suitable for my specific glass, especially if I have special coatings or treatments. When in doubt, consulting the product manual or manufacturer helps avoid any potential damage.
Can These Robots Clean Interior and Exterior Windows Simultaneously?
Yes, many robot window cleaners can clean both interior and exterior windows, but not simultaneously. I’ve found that most models switch between modes, allowing you to set them up for each side separately. Some advanced models even come with dual arms or multiple cleaning pads, making it easier to handle both surfaces in one session. Just remember to check the product specs to verify it meets your specific window cleaning needs.
What Maintenance Is Required to Keep the Robot Functioning Effectively?
Think of maintaining my robot like tending to a trusty steed. I regularly clean the brushes and sensors, ensuring they’re free of dirt and debris. I check the power cord and connections for any wear and tear, and update the firmware when needed. Additionally, I inspect the safety features and replace parts according to the manufacturer’s schedule. This routine keeps my robot running smoothly, so my views stay crystal clear.
Do Robot Window Cleaners Work in Extreme Weather Conditions?
Robot window cleaners typically don’t work well in extreme weather conditions like heavy rain, snow, or strong winds. I’ve found that they perform best in mild, dry weather because wet or gusty conditions can interfere with their sensors and suction. If you live in an area with harsh weather, it’s best to manually clean your windows during storms and use the robot on calmer days for regular maintenance.
Conclusion
So, whether you’re a modern-day Da Vinci or just want a crystal-clear view, these robot window cleaners are game-changers. They tackle smudges and streaks like a trusty squire, making your windows spotless without breaking a sweat. Just like the legendary galleons sailing smoothly through treacherous seas, these gadgets guarantee your windows gleam with ease. Trust me, once you’ve tried one, you’ll never look out a dirty window the same way again.
