This is because Amazon Prime Day 2025 is the first big sale event for most of the new Roombas that debuted in March (they were far too new to get any real discounts during Amazon's spring sale ). And these 2025 Roombas are unlike any Roombas we've seen before.

The AutoWash dock is a revolutionizer and offers up to 75 days of self-emptying and four weeks of mopping and pad washing with zero involvement. The dock is continuously rinsing and drying the mop pads so you receive a sanitary clean, day after day. This way, you can enjoy a spick-and-span home for weeks at a stretch without lifting a finger.

Get the iRobot Roomba Plus 405 Combo Vacuum & Mop for just $399 this Prime Day. It self-empties, scrubs and cleans itself. Save 50% at Amazon today!

As for its mopping function: You should swap out its dustbin tank for a water-filled one and it’ll gyrate its scrub pad against hard surfaces. There’s three options for mopping levels, and when you’re all done, you can toss the scrub pad into the washer to keep it clean.