Roborock S4 Max - Manual (Page 30)

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Routine maintenance
Robot sensors
*Clean monthly
Use a soft dry cloth to wipe and clean all sensors, including:
1. Four cliff sensors at the bottom of the robot.
2. The wall sensor on the right of the robot.
3. The charging contact on the bottom of the robot.
4. Robot vacuum main wheel.
Firmware update
Update the robot using the app. Place the robot on the charging
dock and ensure that the battery level is higher than 20% before
updating. The power indicator will flash white quickly during a
firmware update.
Cliff sensor
main
wheel
Charging contact
Wall sensor