The eufy S1 skips the spinning side-brush approach for something more ambitious. Its HydroJet system uses a roller mop that spins at 170 rpm and continuously flushes itself with clean water and detergent from a dual-reservoir design. That means the mop doesn’t drag dirty water across your floors. It actively washes itself as it goes, applying 1 kg of downward pressure to scrub stuck-on messes.

Suction is strong enough for pet hair and daily debris, and the obstacle avoidance keeps it from eating cables or bumping into furniture. The All-in-One Station handles emptying, cleaning the mop, and refilling the water tank. Multi-level mapping means it remembers different floors or room layouts without re-scanning.

The mop retracts automatically when it detects carpet, so you don’t end up with wet rugs. It’s a thoughtful machine for homes with mixed flooring. The only real limitation is the single side brush. It cleans edges well, but wide-open spaces still require some overlap passes. For a robot that prioritizes mopping over vacuuming, this is one of the most complete systems available.