iRobot Roomba 900 Owner's Manual page 26

UK
Regular Robot Care (Continued)
Cleaning Roomba's Cliff Sensors and Charging Contacts:
1
Wipe Roomba's Cliff Sensors with a clean,
dry cloth.
2
Wipe the charging contacts on the
Roomba and the Home Base with
a clean, dry cloth.
24 Roomba 900 Series Owner's Guide
®
Cleaning Roomba's
Floor Tracking Sensor:
Turn the Roomba over and use a clean,
dry microfibre or soft cotton cloth to wipe
any debris that has accumulated in the
round sensor opening on the right side of
the bottom surface. Do not spray cleaning
solution directly into the sensor opening.