Robot leaves lines of debris behind or pushes dirt around instead of picking it up.

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

Inspect main brush:

• Open the main brush cover and remove the brush.
• Check for worn, flattened, or missing bristles and damaged rubber blades.
• Ensure both end caps are present and intact.

Reinstall correctly:

• Clean the brush cavity and seals.
• Reinsert the brush with the correct orientation (square/hex end into matching socket) and close the cover until it clicks.

If performance is still poor: Replace the main brush with a new Tesvor-compatible brush. Also inspect the brush housing seals; if they are badly worn, suction may bypass the floor and require housing replacement.