Robot vacuum leaves lines of debris along walls or in corners.

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

• Check presence and condition: Ensure the side brush is installed and not broken or excessively worn.
• Clean hub: Remove the side brush and clear hair or fibers from the hub and spindle.
• Replace brush: Install a new genuine Dyson side brush if the old one is bent or bristles are splayed.

If the side brush still does not spin during cleaning, the side brush motor assembly may need replacement.