The Ecovacs Winbot W2 Pro Omni got my filthy windows sparkling clean in minutes, and I can't quite believe it

Ecovacs Winbot W2 Pro Omni: two-minute review

I've reviewed a lot of products during my time as a tech journalist, from tiny smart rings right the way through to electric cars, but I can honestly say that the Ecovacs Winbot W2 Pro Omni is one of the most impressive devices I've ever used.

It does exactly what it promises, getting even filthy windows spotlessly clean, and it's so easy to use that you barely need to glance at the instruction manual. In the words of the late Steve Jobs, it just works.

It's more expensive than some of its rivals (such as the Hobot S7 Pro, which we tested recently), but the Winbot W2 Pro Omni offers a lot to justify its price tag. Its portable power station is particularly useful, allowing you to use the bot even when you can't access a power outlet.

The station holds enough charge for about 100 minutes of cleaning, and doubles as storage for the bot and its accessories, so you can clean the outside of your home without having to feed power cables through windows or rely on extension leads.

Bumpers on each of the Winbot's edges let it know when it's reached a window frame and needs to change direction, but it also has a small spherical sensor on each corner that allow it to detect the edges of frameless glass panels. This means you can use it on glass balcony walls, as well as shower doors and even mirrors.

You can use the bot straight out of the box – just fill its reservoir with cleaning solution, dampen its cleaning cloth and you're ready to start – but connecting it to your phone via the Ecovacs app unlocks its full set of cleaning modes, including light cleaning for interior surfaces that need a quick spruce-up, spot cleaning for troublesome grime like bird poop, and edge cleaning. There's even a manual mode, so you can drive the bot around your window yourself.

Most importantly, the Winbot will get glass really, really clean. I tested it on some embarrassingly filthy windows that hadn't seen soap in over a year, and despite only using a spritz of cleaner and a damp cloth, the bot got them spotless with just one cleaning cycle.

The bot never lost suction either, though the power station should be weighty enough to anchor it in the unlikely event that it does drop. There's even a tether so that you can secure the power station to something solid for even more peace of mind.

I only encountered two minor issues during my time with the Winbot. First, the fact that it has a round sensor in each corner means the microfiber cloth can't get right into the corners of your windows where dirt sometimes accumulates. It's not a huge problem, though, and you can give them a quick wipe after removing the cloth from the robot post-cleaning.

Second, the noise of the Winbot's fan sometimes drowns out the spoken instructions emitted through a speaker on the power station. A volume control would be a worthwhile addition, even if it's only accessible through the app.

In all other ways, the Winbot excels, and I'd happily give it a place in my own home; I don't think my windows have ever been so clean, and it took virtually no effort.

Ecovacs Winbot W2 Pro Omni: price and availability

• Costs $699.99 / AU$999, but sometimes on offer
• Not currently sold in the UK
• More affordable Winbot devices are also available

The Winbot W2 Pro Omni is Ecovacs’ top-end window-cleaning robot, and costs $699.99 / AU$999. It’s sometimes available for a discount, and if you have any of the company’s other products (such as a robot vacuum), you can save a little more cash by signing up for the membership program within the Ecovacs app and completing tasks like connecting your robot via Bluetooth for the first time.

It’s certainly a premium price tag, but if your budget won’t stretch that far, there are other options. For example, the regular Winbot W2 Omni, has all the same features as the Pro, except for the ability to charge its battery and clean simultaneously. This is the only version of the bot available in the UK, where it costs £519.99.

If your windows are all within reaching distance of a power outlet, you might prefer to opt for the Winbot W1 Pro, which costs $399.99 / AU$799. It’s currently sold out in the UK, but has similar specs to the £329 Hobot S7 Pro, which we tested recently.

There’s also the smaller Winbot Mini, which is $239.99 / £299 and can clean windows less than 25cm wide. The Winbot Mini isn’t available in Australia.

• Value score: 4/5

Ecovacs Winbot W2 Pro Omni: design

• Portable power pack for cleaning away from an electrical outlet
• The Winbot itself is lightweight and ergonomically designed
• Strong cable to prevent the bot dropping if it loses suction
• Power pack can also be tethered for peace of mind

The Winbot W2 Pro Omni is unusual for a robot window cleaner in that it’s connected to an external battery pack, so you can use it without a permanent connection to a power socket. This makes it easy to move around the inside and outside of your house, and helps you get the job done faster.

The standard Winbot W2 Omni also has a power pack, but as mentioned above, the Pro version can clean while it charges. This means you can juice it up while cleaning your interior windows, then take it outside fully charged for the exterior work.

The power pack has a robust, comfortable handle with a rubberized grip, and a soft base that protects and grips onto hard floors. It doubles as a storage case for the Winbot and its accessories. These include a bottle of cleaning solution, two cleaning cloths, and a charging cable.

The power station weighs 11.5lbs / 5.2kg, which will probably be enough to anchor the bot in the unlikely event that it drops off the window, but there’s also a strong tether with a carabiner clip so you can secure the station to something solid for extra peace of mind.

The Winbot itself is very light in the hand, with a soft, leather-like handle and a power button that’s easily operated with your thumb. Blue lights on the top and underside of the bot show when the power is on.

On the top you’ll find a small reservoir for cleaning fluid, which holds about 60ml. That might not sound like much, but the bot is very frugal with it. When the bot is working, the fluid sprays out of nozzles on the top and bottom depending on its direction of travel, and is mopped up with the cloth.

Turn it over and you’ll see two tracks that allow the bot to move across your window, an inlet for the suction that holds it firmly against the glass, and a textured surface that holds a microfiber cloth in place.

Bumpers on each edge tell the bot when it’s met a window frame, and spherical sensors in each corner detect the edges of surfaces without a frame. You’ll be prompted to clean these regularly, which only takes a quick wipe.

The Winbot is connected to the power pack by a robust cable, which according to Ecovacs has a tensile strength of up to 100kg. The cable has a smooth braided nylon exterior, which lets it move smoothly without snagging if you need to run it through an open window.

Before using the Winbot, you check the reservoir has enough cleaner, then dampen the cloth and place it on the bottom of the machine. Unlike the Hobot S7 Pro, it uses one cloth at a time, so you don’t have to worry about lining up separate pieces. When it’s dirty, either turn it over and continue cleaning, or toss it in the wash and use the spare one provided.

• Design score: 5/5

Ecovacs Winbot W2 Pro Omni: performance

• Exceptional cleaning, even on very dirty windows
• Can also be used on frameless glass surfaces
• Never lost suction during testing
• Fan sometimes drowns out spoken instructions

The Winbot W2 Pro Omni exceeded all my expectations, and made light work of some frankly filthy windows, despite only using a spritz of cleaner and a damp cloth. The before and after image below shows just how much grime its ‘thorough’ cleaning program can remove with a single pass on each side of the glass, and I think it speaks for itself.

The Winbot is also extremely easy to use, and the battery pack even comes pre-charged so you can start cleaning straight away. To begin, just fill the reservoir with cleaning solution (the bottle has a fine nozzle that prevents accidental spillage), put the damp cloth in place, hold the button on the power pack for two seconds until you hear a chime, then hold the Winbot against your window and hold its button for another two seconds.

The suction will begin and the bot will swivel a little to make sure it’s established a good seal against the glass. A speaker in the power pack will announce when the bot is firmly attached to the window and it’s safe to let go.

Once you’ve released it, the bot will roll across your window, gently nudging your frame or detecting the edge of the glass, and changing direction accordingly. Its wide-angle nozzles will spray a little cleaner every few seconds, while the cloth works to lift dirt. The Winbot will ‘remember’ the dimensions of your window, helping ensure it gets right to the edges on subsequent passes.

Once it’s finished cleaning, the bot will always return to where it started, making it ideal for cleaning tricky windows where you can’t reach the whole pane.

Because the robot only uses a light spray of cleaner and a damp cloth, there’s no need to worry about runs and drips. However, I’d still recommend working from top to bottom in case the spray hits your bottom windows as the bot is moving.

Although it’s not mandatory, the Ecovacs mobile app gives you access to a lot more cleaning modes, including edge cleaning, light cleaning for indoor surfaces, and manual control so you can drive the bot around the window yourself and tackle stubborn marks.

Setup is straightforward - just install the app and create an account, allow it to connect to the bot via Bluetooth, and give the bot a name to unlock its full collection of cleaning modes:

• Fast cleaning
• Spot cleaning
• Deep cleaning
• Thorough cleaning
• Edge cleaning
• Zone cleaning
• Heavy-dury cleaning

The last mode is particularly useful, allowing you to change the cloth partway through cleaning a pane, then resume in the same place.

I particularly appreciated the Winbot’s ability to clean frameless glass. This would be very handy if you have frameless glass panels around the edge of a balcony, but it also means you can use it to clean mirrors or even shower doors. Unlike the Hobot S7 Pro, the Winbot W2 Pro Omni copes well with surfaces that are too small for it to make a complete turn.

The bot never ran into trouble during my testing, but if it does somehow lose suction, the speaker on the power pack will issue a loud warning chime and the light on the Winbot will turn red to indicate a problem.

In fact, I only experienced two small issues during my time testing the bot. First, although the Winbot W2 Pro Omni is relatively quiet (Ecovacs cites a range of 76dB to 63dB, and during my tests it averaged around the lower end of this scale), sometimes the noise of its fans made it hard to hear the spoken instructions from the speaker in the power pack. I would have appreciated a volume control to make the announcements a bit louder.

Secondly, the spherical sensors on the underside of the bot mean the cloth can’t reach right into the very corners of your window. I can’t really see a way to avoid this, and you can easily give the corners of the glass a quick wipe with the microfiber cloth after you’ve removed it.

Overall though, I was extremely impressed by the Winbot W2 Pro Omni. I had modest expectations after hearing about my colleague Ruth’s experiences with her first window-cleaning robot, but the Winbot blew me away. If you’ve been wondering whether to pick one up, I don’t think you’ll regret it.

• Performance score: 5/5

Should you buy the Winbot W2 Pro Omni?

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Ecovacs Winbot W2 Pro Omni: also consider

How I tested the Ecovacs Winbot W2 Pro Omni

I used the Ecovacs Winbot W2 Pro Omni to clean windows of various sizes, including floor-to-ceiling panes, on the inside and out using the cleaning solution provided. Many of the windows were very dirty on the outside and presented a tough challenge. I used the robot in its default mode (thorough cleaning), and tested its various different presets.

I also tested the Winbot on frameless glass panels, including a shower door and mirrors of various sizes to see whether its sensors would successfully detect the edges, and how well it would cope with surfaces not much larger than the bot itself.

I assessed how easy the Winbot was to use, and checked for any design features that might prove problematic over time. I also checked the volume of its fan in operation using a decibel meter.

First tested June 2025