Don’t stress anymore when you get home about having to mop and vacuum. You should enjoy a clean home when you get back from a long day of work, a nd the iRobot Roomba combination mop and vacuum can make that happen for just $400—a 50% discount for Amazon Prime members.

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.

Starting July 8, Prime Day will run for four days with deep price cuts on smart home gadgets, including the Roomba Robot Vacuum and Mop Combo from iRobot that drops down to an all-time low of $140 from its original $275 price tag.