Vacuum leaves lines of debris behind and does not pick up well from carpets

Safety first: Remove the battery before working on the brush roll.

• Inspect brush roll: Remove the floor head and access the brush bar. Check bristle length; if they are very short or uneven, replace the brush roll.
• Clear hair and fibers: Cut away hair and threads from the brush and end caps.
• Check rotation: Spin the brush by hand. It should rotate freely without grinding.
• Verify brush motor operation: Reinstall the brush and, with the vacuum reassembled, briefly run the unit and look for brush rotation. If it does not spin, the brush motor or drive may need replacement.
• Adjust settings: If your model has a carpet/hard floor selector, ensure it is set correctly for the surface.