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Roomba cliff sensors: wipe gently with a dry microfiber cloth

iRobot advises regularly wiping Roomba cliff-sensor windows with a clean, dry microfiber or soft cotton cloth. Do not spray water or cleaner directly onto the sensors.

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Wikimedia Commons · Katantuk, 'Roomba' (25 January 2009), CC BY-SA 3.0, https://commons.wikimedia.org/wiki/File:Roomba.jpg ; no modifications · Creative Commons Attribution-ShareAlike 3.0 Unported ↗

Robot vacuums have cliff-sensor windows underneath to detect drops. iRobot says their placement varies by model but routine cleaning is similar. A clean sensor is not a guarantee against falls; follow the manufacturer's stair and boundary safety instructions.

Your try-it-at-home checklist

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Locate the cliff sensors using the manual for your exact Roomba model; distinguish them from charging contacts and cameras.
Stop the robot, power it down and remove it from the dock. Place a soft cloth on the surface beneath it.
Carefully turn the robot over and inspect the underside cliff-sensor windows for dust.
Gently wipe each sensor window with a clean dry microfiber or soft cotton cloth. Do not spray water, alcohol or cleaner directly.
If a sensor appears scratched or cloudy, avoid aggressive rubbing or disassembly and consult iRobot support.
Return the robot upright and check normal operation following the manual. Keep using manufacturer-approved boundaries and physical stair precautions; cleaning is not fall-proofing.

Your try-it-at-home checklist

Further reading

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