4 Things to Know About Cleaning Robot Vacuum Cliff Sensors

Use a dry microfiber cloth only Cliff sensors are optical IR sensors that get blocked by dust or smudges. A gentle wipe with a dry microfiber cloth clears the beam and stops false drop-off readings.

Never use water, alcohol, or cleaning sprays Moisture can seep into the sensor housing and cause shorts or fogging. Stick to dry cleaning methods.

Compressed air works for loose dust, but cloth is better for grime If dust is loose, compressed air can blow it away. But a dry cloth is more reliable for sticky buildup.

Avoid cotton swabs and scratching the sensor window Cotton swabs can leave fibers behind. Never scratch the sensor surface — just a light wipe is enough.