According to a WIRED review published August 19, 2026, writer Simon Hill set out to automate window cleaning with the Ecovacs Winbot W2S Omni, a premium robot that is highly rated online. Hill, who owns a robot vacuum and a robot mower and says he would never go back to doing those chores manually, ended the test wondering "why anyone would want a window-cleaning robot at all." The review notes that most problems Hill encountered apply to the entire category, not just the Ecovacs model.
Clean on Paper: Specs and Setup
According to the review, the Winbot W2S Omni ships in a charging case that includes its own battery. The case weighs about 15 pounds and looks like "a little cooler with a folding handle," with slots and compartments for cables, spare pads, cleaning solution, and the robot itself, attached by a retractable, braided, 18-foot cable. A full charge provides 110 minutes of cleaning. The cleaning pads are microfiber pads.
The robot measures 10 by 10 by 2.5 inches and weighs about 4 pounds. Cleaning pads attach via Velcro, and the device has a leatherlike strap for handling. Press the button on the front to start it; it takes a few seconds to ramp up suction before telling the user it is firmly in place. The review describes this as "a nerve-racking moment the first few times" but notes the suction is powerful.
A button on the case cycles through four modes: Deep and Thorough for exterior windows, Fast for interior windows, and Edge Cleaning. Hill found setup "quick and easy."
The Real-World Test: Handles, Bay Windows, and Dirt
Hill started with the largest window in his house, a ground-level modern window roughly 7 by 10 feet. The robot navigated to the top "using its tank-style tracks" and cleaned in horizontal lines, with small bumpers to detect edges and occasional spurts of cleaning fluid. According to the review, the first window came out "decent" — with dirty residue in the corners and smearing in places.
The back door was the next challenge. The robot struggled with the handle. After cleaning the inside and outside of the first window and door, the device asked Hill to change the pad and refill the cleaning solution. It comes with one spare pad, and flipping the pads quickly fills the Velcro with muck, the review says.
The biggest failure came on the tall bay windows of Hill's Victorian house. Hill had tried ladders and an extending cleaning pole without success, so he hoped the robot would solve the problem. Instead, on an interior pane — the window was a traditional sash-and-case bay window, recently replaced at great expense — the robot got stuck on the metal loop fittings and gave up. On the exterior, it was slow, eventually cleaning most of the window but leaving "a clag of muck in the corners" and dirty stripes down the edges. At the bottom, the robot performed what Hill described as a "weird stuttering maneuver" that ended in damage.
Cheaper Alternative and Category Verdict
For comparison, Hill briefly tested the Mova N1, a window-cleaning robot priced at $199. He states the Ecovacs has "a much smarter design and cleans more efficiently" — and might be the best window-cleaning robot available. The table below summarizes what the review revealed about the two devices.
| Feature | Ecovacs Winbot W2S Omni | Mova N1 |
|---|---|---|
| Price | Not disclosed in review | $199 |
| Robot dimensions | 10 x 10 x 2.5 inches | Not disclosed |
| Robot weight | ~4 pounds | Not disclosed |
| Carrying case weight | ~15 pounds (with battery) | Not disclosed |
| Tether cable | 18-foot retractable braided | Not disclosed |
| Battery runtime | 110 minutes | Not disclosed |
| Cleaning modes | 4 (Deep, Thorough, Fast, Edge Cleaning) | Not disclosed |
| Reviewer verdict | Smarter design, cleans more efficiently | Less efficient of the two |
Despite the Ecovacs' advantages, the review's final position is clear: the entire category is not worth it for most homes. Hill wrote: "There are circumstances where I can imagine it working well" — such as a house with many large ground-level windows, where a window-cleaning robot "might be worth looking at." But the accumulated problems with handles, bay windows, corners, and maintenance lead to this conclusion:
I just don’t think a robot for cleaning windows is worthwhile for most homes.
The review leaves the door open for the Ecovacs Winbot W2S Omni as perhaps "the best window-cleaning robot you can get," but that distinction, in Hill's telling, does not translate into a product most households should buy.
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