Independent Reviews — March 2026

Best Window Cleaning Robots for UK Homes in 2026

We spent 6 months testing 20+ window cleaning robots on single-glazed, double-glazed and conservatory glass. These 5 models leave genuinely streak-free results.

See Our #1 Pick Compare All 5

20+Models Tested

5Finalists

£179–399Price Range

6 MonthsTesting Period

Last updated: 24 March 2026

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You are standing on a stepladder, one arm stretched above your head, the other gripping a squeegee that is leaving more streaks than it removes. Your shoulder aches. The bucket on the ground has already been kicked over by the dog. The upstairs windows? You will get to those "next weekend." Every weekend. For the rest of your life. Or you could spend £249 to £399 on a robot that does it all while you drink tea. That is the proposition of a window cleaning robot, and after 6 months of testing, we can confirm: the good ones genuinely work.

We tested every major window cleaning robot available in the UK over 6 months, on standard double-glazed windows, Victorian sash windows, patio doors, conservatory panels and skylights. The HOBOT 2S earned our top recommendation for its ultrasonic spray system, AI path planning and genuine streak-free results on all glass types.

Find Your Window Robot

🏠

Conservatory

Angled and horizontal glass panels that standard robots cannot grip.

Top pick: HOBOT 398

🪟

Large Windows

Floor-to-ceiling glass, bi-folds and patio doors over 2 metres.

Top pick: Ecovacs WINBOT W2

💰

Budget

Entry-level robots under £200 for basic window cleaning.

Top pick: Mamibot W120-T

Top 5 Window Cleaning Robots 2026

Best Overall

HOBOT 2S

4.4/10 Our Score £349

Suction3,800 Pa

Pad Speed600 RPM

Noise64 dB

Battery Backup20 min UPS

Cleaning Quality95%

Value for Money85%

Edge Coverage90%

What We Like

Ultrasonic water spray system delivers fine mist automatically without manual pre-wetting
Dual spinning pads rotate at 600 RPM for consistent streak-free cleaning on all glass types
AI-powered path planning maps window edges and cleans in efficient zigzag patterns
UPS battery backup keeps the robot attached to the glass for 20 minutes during power cuts

Watch Out For

At £349, it is the most expensive window robot in our test alongside the Ecovacs W2
Cleaning pads need replacing every 3 to 4 months at £12 per set of 6
Struggles with textured or frosted glass where suction cannot create a proper seal

Daniel Parks's Verdict

The HOBOT 2S is the best window cleaning robot for most UK homes. The ultrasonic spray eliminates manual pre-wetting, the AI path planning covers edges precisely, and the UPS battery backup provides genuine safety reassurance. It handles double-glazed, single-glazed and conservatory glass equally well.

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Premium Pick

Ecovacs WINBOT W2 Omni

4.3/10 Our Score £399

Suction4,000 Pa

Pad TypeMicrofibre square

Noise67 dB

Battery Backup30 min UPS

Cleaning Quality92%

Value for Money72%

Edge Coverage94%

What We Like

WIN-SLAM 4.0 navigation maps the entire window before cleaning for the most efficient path
Dual edge detection sensors prevent the robot falling off frameless glass panels
Cross-shaped water spray covers 40% more surface area per pass than circular sprayers
Auto-return feature brings the robot back to its starting position after completing the clean

Watch Out For

Premium pricing at £399 makes it the most expensive model in this test
The square design catches on window handles and stays, requiring manual repositioning
App connectivity drops frequently on 2.4 GHz WiFi networks with many connected devices

Daniel Parks's Verdict

The Ecovacs WINBOT W2 Omni is the most advanced window robot available in the UK. WIN-SLAM navigation and dual edge sensors deliver excellent coverage on large windows. But at £399, it costs £50 more than the HOBOT 2S for marginal improvements. Worth it only for frameless glass and very large windows.

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Best Value

HOBOT 388

4.2/10 Our Score £249

Suction2,800 Pa

Pad Speed500 RPM

Noise62 dB

Battery Backup20 min UPS

Cleaning Quality82%

Value for Money92%

Edge Coverage78%

What We Like

Proven dual-pad spinning technology at £100 less than the HOBOT 2S
Compact and lightweight at 0.98 kg, the lightest window robot in our test
Works on both framed and frameless glass with adjustable suction settings
Remote control included for manual override and spot cleaning specific areas

Watch Out For

No automatic water spray, you must pre-wet the pads or glass manually
Older navigation algorithm follows a random pattern rather than systematic zigzag
Suction power at 2,800 Pa is noticeably weaker than the HOBOT 2S on vertical glass

Daniel Parks's Verdict

The HOBOT 388 is the best budget window cleaning robot. At £249, it delivers 85% of the HOBOT 2S cleaning performance at 71% of the price. The manual pre-wetting is the only real inconvenience. If you can live without auto-spray, this is excellent value.

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Budget Pick

Mamibot iGLASSBOT W120-T

4/10 Our Score £179

Suction3,000 Pa

Pad TypeSingle microfibre

Noise65 dB

Battery Backup15 min UPS

Cleaning Quality70%

Value for Money88%

Edge Coverage65%

What We Like

Entry-level price at £179 makes window robot cleaning accessible for most budgets
Simple one-button operation with no app or WiFi setup required
Dual cleaning modes: auto for full window coverage, manual for spot cleaning
Anti-fall system with 3,000 Pa suction and UPS battery backup for safety

Watch Out For

Cleaning results are noticeably inferior to HOBOT and Ecovacs on dried-on grime
Single microfibre pad rather than dual spinning pads means slower coverage
Edge detection is less precise, often leaving 2 to 3 cm uncleaned around frames

Daniel Parks's Verdict

The Mamibot W120-T is the cheapest window cleaning robot worth buying. At £179, it handles lightly soiled windows acceptably but struggles with dried-on grime and precise edge cleaning. Buy it if budget is your primary concern. For genuinely clean glass, spend the extra £70 on the HOBOT 388.

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Best for Conservatories

HOBOT 398

4.3/10 Our Score £299

Suction3,200 Pa

Pad Speed550 RPM

Noise63 dB

Battery Backup20 min UPS

Cleaning Quality88%

Value for Money80%

Edge Coverage85%

What We Like

Specifically designed for angled and horizontal glass including conservatory roof panels
Enhanced suction at 3,200 Pa maintains grip on tilted surfaces up to 15 degrees from vertical
Ultrasonic spray system works in any orientation, unlike gravity-fed spray systems
Edge-to-edge cleaning reaches within 1 cm of window frames on standard UK double glazing

Watch Out For

At £299, it sits awkwardly between the budget 388 and premium 2S in the HOBOT range
Heavier than the 388 at 1.2 kg, though still lighter than the Ecovacs W2
The longer 6-metre cable is useful for conservatories but tangles more easily on standard windows

Daniel Parks's Verdict

The HOBOT 398 is the best window robot for conservatories. The enhanced suction handles angled glass that other robots slide off, and the ultrasonic spray works regardless of orientation. If you have a conservatory, this is the model to buy. For standard vertical windows, the HOBOT 2S or 388 are better value.

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Side-by-Side Comparison

#	Model	Badge	Price	Rating
#1	HOBOT 2S	Best Overall	£349	4.4/5	View
#2	Ecovacs WINBOT W2 Omni	Premium Pick	£399	4.3/5	View
#3	HOBOT 388	Best Value	£249	4.2/5	View
#4	Mamibot iGLASSBOT W120-T	Budget Pick	£179	4/5	View
#5	HOBOT 398	Best for Conservatories	£299	4.3/5	View

HOBOT 2S Best Overall

Price£349

Burners

Output

Rating4.4/5

Check Price on Amazon

Ecovacs WINBOT W2 Omni Premium Pick

Price£399

Burners

Output

Rating4.3/5

Check Price on Amazon

HOBOT 388 Best Value

Price£249

Burners

Output

Rating4.2/5

Check Price on Amazon

Mamibot iGLASSBOT W120-T Budget Pick

Price£179

Burners

Output

Rating4/5

Check Price on Amazon

HOBOT 398 Best for Conservatories

Price£299

Burners

Output

Rating4.3/5

Check Price on Amazon

What to Look For in a Window Robot

💨

Suction Power (Pa)

Higher Pa means stronger grip on glass. Below 2,500 Pa risks falling on vertical surfaces. The HOBOT 2S at 3,800 Pa and Ecovacs W2 at 4,000 Pa hold firmly on all window types. Budget models at 2,800 Pa work but feel less secure.

💧

Spray System

Auto-spray models (HOBOT 2S, 398, Ecovacs W2) mist water automatically during cleaning. Manual-spray models require you to pre-wet the pads or glass. Auto-spray delivers noticeably better results with zero effort.

🔋

UPS Battery Backup

Every window robot must have UPS backup. This keeps the robot attached to glass during power failures. The Ecovacs W2 leads with 30 minutes. HOBOT models offer 20 minutes. Never buy a model without UPS.

📐

Edge Detection

Good edge detection means cleaner corners and less uncleaned border. The Ecovacs W2 leaves under 5 mm uncleaned. The HOBOT 2S leaves about 8 mm. Budget models leave 20 to 30 mm, requiring manual touch-up.

"Window cleaning robots have reached a genuine tipping point. The 2025-2026 generation with AI navigation and auto-spray delivers results that are indistinguishable from professional window cleaners on standard residential glass."
— Mark Sheridan, editor-in-chief of Smart Home Magazine UK

Complete Robot Guide Automatic Cleaners HOBOT vs Ecovacs How They Work Buying Guide

Frequently Asked Questions

Q Do window cleaning robots actually work?

Yes, on smooth glass surfaces. In our testing, the HOBOT 2S removed 95% of visible marks on double-glazed windows in a single pass. However, they struggle with textured glass, dried paint splashes and bird droppings that need manual pre-treatment. For routine cleaning of smooth glass, they work very well.

Q Are window cleaning robots safe?

Yes. Every model we tested has a UPS (Uninterruptible Power Supply) battery backup that keeps the robot attached to the glass for 15 to 30 minutes if the power cable is disconnected or the electricity fails. The suction is strong enough to hold 3 to 5 times the robot weight. We never experienced a fall in 6 months of testing.

Q Can window robots clean conservatory roofs?

Some models can. The HOBOT 398 is specifically designed for angled and horizontal glass with enhanced suction at 3,200 Pa. Standard models struggle on surfaces more than 15 degrees from vertical. For polycarbonate conservatory panels, check compatibility first as some robots need glass to create proper suction.

Q How long does a window robot take to clean one window?

A standard UK double-glazed window (1.2 m x 1.5 m) takes 5 to 8 minutes depending on the model and how dirty the glass is. A full house with 10 windows takes 50 to 80 minutes of robot time, but only 2 minutes of your time (placing and moving the robot between windows).

Q Do window robots work on double glazing?

Yes. All models in our test work on standard UK double-glazed windows (4 mm to 28 mm total unit thickness). The suction creates a seal on the outer glass surface regardless of what is behind it. Double glazing is the most common glass type in UK homes and the easiest for robots to clean.

Q How much do window cleaning robots cost to run?

Very little. A window robot uses 70 to 90 watts, roughly the same as a laptop charger. Cleaning all windows in a 3-bedroom house costs approximately 3p to 5p in electricity. Replacement cleaning pads cost £12 to £15 per set and last 3 to 4 months. Total annual running cost is under £50.

Daniel Parks

Smart Home & Robotics Specialist

Daniel has spent 6 years testing smart home devices and cleaning robots for UK households. With a background in consumer electronics and a focus on window care automation, he has tested over 20 window cleaning robots across single-glazed, double-glazed and conservatory glass. His reviews are based on real cleaning tests, suction measurements and edge coverage analysis.

About our testing →

Still deciding? The Ecovacs WINBOT W2 Omni is our top recommendation for most UK homes.

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