iGLASSBOT W120-P
Limited evidenceRead the findings →Mamibot's older square window robot, with twin sprayers and an automatic return to where it started. It's aimed at anyone wanting a simple, light window cleaner. Mamibot's page doesn't mention a backup battery or safety rope.
See the alternatives below, or switch market.
Where it sits in Mamibot’s range
- iGLASSBOT W120-PThis model
- iGLASSBOT W120-DPNewer square model with four nozzles and a backup battery
- iGLASSBOT W100Budget round model with two spinning pads
- iGLASSBOT W168Round model with twin sprayers and an 80ml tank
- W200 SkyBotCordless model with no sprayer
- iGLASSBOT W300Flagship that sprays, wipes and squeegees in one pass
Feedback
What we know
The details on the W120-P come from Mamibot's product page and its Mamibot overview. Its closest relative with a published test is the newer W120-DP, a square sibling with more nozzles and grip that adjusts itself. heise online found that model navigated well and found frames reliably, but left streaks and a greasy film. How much of that carries over to the W120-P is covered below.
heise online, hands-on, Aug 2025 (tested on the Mamibot iGLASSBOT W120-DP; Tests the newer W120-DP, not the W120-P)
You decide when it sprays
The W120-P's two sprayers fire water in the direction it's heading. Mamibot gives you three settings: a spray every five seconds in automatic mode, every 10, 15 or 20 seconds set from the app, or one spray per press, which is the default. A 50ml tank holds about 170 sprays. That control could help you avoid over-wetting the glass, a common cause of streaks, and the default one-press setting puts you in charge of every spray.
Set routes, then back to start
Mamibot lists zigzag, lane and combined cleaning patterns, sensors that predict collisions and steer round window handles, and an automatic return to where it started once it's done, so it's easy to lift off. At 7.8cm thick and 1.35kg, it's slim and light to carry between windows. All of these details come from Mamibot's product page.
What the sibling's test suggests
heise online tested the newer W120-DP, not this model. It found navigation surprisingly good for a cheap robot, with corner sensors that reliably found the frame, but the cleaning left streaks and a greasy film. The W120-P has a different spray system and no self-adjusting grip, so those results may not carry over. Nobody has checked the W120-P's own cleaning, noise or spray control yet.
Safety details are missing
Most window robots list a backup battery that keeps them stuck to the glass if the power fails, plus a safety rope. Mamibot's W120-P page mentions neither, though it does describe four sensors to stop it falling off frameless edges. The W120-DP's page lists a backup battery, and heise online found a 5m rope with that model. Look in the W120-P's box and manual before using it outside.
Our take
Should you buy the iGLASSBOT W120-P?
Best for: Large windows cleaned regularly, with a socket nearby. Skip it if: You want a stronger record in independent tests before buying.
Hold off. It's untested, the one review of its newer square sibling found streaks, and Mamibot's page doesn't mention a backup battery. If you want a Mamibot square robot, the W120-DP at least has a test behind it and a listed backup battery. Better still, the Ecovacs WINBOT mini had two German home tests that found mostly streak-free glass.
The W120-P arrived in 2023 as Mamibot's fifth-generation square window cleaner, and its second with a built-in sprayer. It's slim at 7.8cm and light at 1.35kg. It sprays water ahead of itself from a 50ml tank, and you choose how often: every five seconds, every 10 to 20 seconds from the app, or one press at a time. It cleans in zigzag or up-and-down patterns and comes back to where it started, so it's easy to lift off. The newer W120-DP adds more nozzles and grip that adjusts itself.
The trade-off is the finish and the safety kit. heise's test of its square sibling, the W120-DP, found streaks left behind, and this model's different spray system may not change that. Mamibot's W120-P page also says nothing about a backup battery or a safety rope, which most window robots have in case the power fails. Check what's in the box before using it on an outside window.
Before you buy
The questions people ask about this one
Will it work on frameless glass?
Mamibot says so. the specifications describes four sensors that pick up edges and obstacles, especially where two frames meet, to stop it falling off frameless glass. Nobody has tested that on the W120-P, so watch its first run closely.
What happens if the power cuts out?
We can't tell. The W120-P's page, the specifications, mentions no backup battery or safety rope, unlike the W120-DP's, and heise online found both on that sibling. Check the manual and the box before trusting it on an outside window.
Does it leave streaks or edges?
Not tested on the W120-P. heise online found its sibling, the W120-DP, removed coarse dirt but left streaks and a greasy film. The W120-P's adjustable spray timing, per the specifications, may help avoid over-wetting, but nobody has checked.
Can it clean mirrors and tiles?
the specifications lists window glass, bathroom glass, seamless walls and floors. Mamibot adds that Mamibot's window robots suit smooth upright surfaces and aren't recommended for rough, textured or uneven ones.
Alternatives
Other window-cleaning robots to compare.
WINBOT MINI
Why consider it: Two German home tests found it left small and medium panes mostly streak-free after one pass.
The compromise: It needs a socket nearby, and one tester saw dirt left in the last millimetres at the frame.
iGLASSBOT W120-DP
Why consider it: Mamibot's newer square model lists a backup battery, and heise found it navigated well and found frames reliably.
The compromise: The same test found streaks and a greasy film left behind.
WINBOT mini 2
Why consider it: Compact, and a tester found it cleared fingerprints and dust and reached right to the frame.
The compromise: It's loud, slow on dried-on marks, and you'll stand beside it the whole time.
Specs
Full specifications
Each specification names its source. Manufacturer claims are not independent test results; unconfirmed figures are labelled.
Owner reviews
Do you own the iGLASSBOT W120-P?
Tell people how it’s held up: cleaning, maintenance, faults and support. Owner accounts are shown separately from independent reviews.
Sources
Where this page’s findings come from
Editorial reviews
- heise online: Günstiger Fensterputzroboter reinigt smart: Mamibot W120-DP mit App im Test ↗Hands-on · Tested on the Mamibot iGLASSBOT W120-DP · Tests the newer W120-DP, not the W120-P (not counted towards our two-review minimum)
Sources
- Mamibot: iGLASSBOT W120-P product page ↗Manufacturer
- Mamibot: Mamibot robot window cleaner range and FAQ ↗Manufacturer
Videos
- Mamibot Francis: Mamibot iGlassbot W120-P window robot with two-way water spraying function 2023 ↗
- Search YouTube for Mamibot iGLASSBOT W120-P ↗Search results may include company demonstrations or similar models. Check the source and model name; a demonstration is not an independent performance test.