1. Remove the side brushes.

2. Carefully unwind and pull off any hair or string that is wrapped between the robot     and the side brushes.
3. Use a cloth dampened with warm water to remove dust from the brushes or to     gently reshape them.

4. Reinstall side brush onto robot.
Note:
1. Only use the side brushes when they are completely dry.
2. To protect your wooden or carpeted floor, our side brushes are made of soft  materials and may become curled after used for some time, but it will not affect the  cleaning effect.
3. If side brush bristles are curled, please put bristles into boiled water about 2mins, then use dry cloth to dry and reshape bristles.
Model: L9000