Mamibot iGLASSBOT W168 Review: The Round-Window Specialist (2026)

Round and irregular windows are the toughest test for any automated cleaner, and most models simply avoid them. The Mamibot iGLASSBOT W168 takes the opposite approach: it is built specifically for round glass. In this robot window cleaner review, we examine whether a compact, corded design with dual spray nozzles can justify a spot on our list of the best window cleaning robot 2026 options, and where it falls short.

Design and Round-Window Fit

The W168 is a compact, corded unit, and that combination matters more than it first appears. Corded power means the robot never trades suction for battery life mid-cycle, which is a quiet advantage for window cleaning robot safety on vertical glass. Its defining feature, however, is shape compatibility: this model is rated for round windows, a category where most rivals simply cannot operate. If your home has porthole-style, arched, or otherwise irregular panes, the field of contenders shrinks dramatically, and the W168 is one of the few purpose-built answers. The compact body also helps it navigate tighter frames and curved edges without the awkward overhang you get from larger rectangular robots.

Cleaning Performance and Dual Spray Nozzles

Two spray nozzles wet the glass ahead of the cleaning path, which helps loosen dust and light grime before the pad passes over it. On small and medium round panes, this produces a genuinely useful clean with minimal streaking. The trade-offs are honest and predictable. The water tank is smaller than those on larger machines, so you will refill more often, and the robot is slower on large glass surfaces. That slowness is not a defect so much as a consequence of the compact format: it covers less area per pass. For a bathroom porthole, a curved balcony panel, or a decorative round window, the pace is perfectly acceptable. For a full wall of floor-to-ceiling glass, look elsewhere.

Safety, Suction, and High-Rise Use

For anyone weighing a best robot for high rise windows, the W168's corded design is a meaningful point in its favor. Continuous mains power supports steady window cleaner suction power throughout the session rather than tapering off as a battery drains, and there is no mid-clean shutdown risk from an empty cell. That said, this is a compact round-window device, not a heavy-duty high-rise workhorse. Its smaller contact area and lighter build suit smaller panes, and we would not position it as a replacement for a large-format machine on expansive exterior glass. Used within its intended scope, with the safety tether properly attached, it is a sensible and controlled option.

Is an Automatic Window Washer Worth It?

The honest answer depends entirely on your glass. If your windows are standard rectangles, a conventional robot will cover them faster and with less refilling. If you own round, arched, or irregular panes, the W168 solves a problem most of the market ignores, and that specificity is exactly what makes an automatic window washer worth it in this niche. At a rating of 7.8, it earns a solid recommendation rather than an enthusiastic one: excellent fit for its target shape, average pace everywhere else. Buy it for the geometry, not for raw speed.