Shark Stratos NeverTouch 2-in-1

It auto-empties into a 2 L bag, so you only swap it every few weeks, though the mop tray needs occasional manual wiping.

The robot is 3.2 inches tall, so it slides under most sofas, beds, and cabinets with room to spare.

It clears obstacles up to 25 mm, so it handles standard door sills and most transition strips.