Robot lawnmower emits a high-pitched squeak or chirp when wheels turn.

Safety first: Turn off the mower and place it on a stable surface.

• Clean wheel hubs: Remove the Hyundai drive wheels and clean dirt and grass from the hub and axle area.
• Lubricate bearings: Apply a light, plastic-safe lubricant to the wheel bearings or bushings (avoid getting lubricant on the tire tread).
• Check for wobble: Reinstall wheels and check for excessive play. Replace wheels or axle components if loose.