Robot vacuum does not pick up fine dust along walls and corners, leaving a visible edge of dirt.

Safety first: Turn off the robot and flip it over.

• 1. Inspect side brush:
  • Check if bristles are bent backward or worn short.
  • Replace the side brush if deformed or worn.
• 2. Confirm correct installation:
  • Ensure the side brush is firmly seated on the motor shaft and secured with its screw.
• 3. Clean around the brush:
  • Remove hair and debris from the side brush hub and surrounding area.
• 4. Test edge cleaning:
  • Start a cleaning cycle and observe the robot along walls.
  • If the brush does not spin or is very slow, the side brush motor may need replacement.