Robot vacuum produces a high-pitched whine or squeal from the wheels while moving.

Safety first: Turn the robot OFF and place it upside down on a soft surface.

• 1. Spin wheels by hand: Rotate each drive wheel and listen for squeaks or grinding.
• 2. Clean around axles: Use tweezers and a brush to remove hair and dust from around the wheel axles and suspension joints.
• 3. Check for wobble: Gently wiggle each wheel side to side. Excessive play indicates worn bushings or bearings.
• 4. Limited lubrication (if allowed): If the manufacturer permits, apply a tiny amount of dry PTFE lubricant to the external axle area only, avoiding the tire surface.
• 5. Replace wheel module: If noise persists or the wheel feels rough, replace the affected drive wheel module.

Warning: Do not use oil-based lubricants; they attract dust and can damage plastic components.