3 Steps to Clean Robot Vacuum Cliff Sensors With Alcohol

Use a cotton swab lightly dampened with isopropyl alcohol A dry swab can smear dirt and dust around. Alcohol cuts through grime and dries fast — just don’t soak the swab.

Wipe the cliff sensors gently Those small circular cutouts on the bottom get dusty or covered in hair, causing the vacuum to think there’s a drop when there isn’t. Wipe each sensor gently and let it air dry for a minute.

Repeat every few weeks Check your manual first, as some vacuums have a sensor cleaning mode. This method works for Roomba, Roborock, and most others, and prevents your vacuum from backing away from thin air.