Robot vacuum's side brush frequently falls off during cleaning.

Safety first: Turn OFF the robot before handling the side brush.

Secure brush:

• Reinstall the side brush and tighten the retaining screw firmly but not excessively.

Inspect hub and shaft:

• Check the plastic hub of the brush for cracks or rounding; replace the brush if damaged.
• Ensure the motor shaft is not bent or stripped.

Use correct parts:

• Use original or compatible Proscenic side brushes designed for your model.

Advanced: If the brush still falls off, the motor shaft may be worn and the side brush motor assembly may need replacement.