Roborock Qrevo Slim

It empties into a 2.7 L bag, refills the robot's water, and cleans its own base, so most homes go weeks between hands-on upkeep.

At just 3.2 inches tall, it slides under most sofas, beds, and cabinets with ease.

It clears obstacles up to 20 mm, so it handles standard door sills but may stop at taller thresholds.

It washes the mop with hot water rather than auto-dispensing detergent, so you add cleaning solution yourself if you want it.