Robot mower drifts sideways on slopes or cannot climb inclines it previously managed.

Safety first: Turn OFF the mower before inspecting wheels.

• Inspect wheel treads: Check for smooth or worn rubber/plastic on the drive wheels. Replace wheels if the tread is significantly worn.
• Adjust mowing time: Avoid mowing steep slopes when the grass is wet and slippery.
• Boundary adjustment: Exclude the steepest areas from the mowing zone if they exceed the mower's specified maximum slope.
• Motor check: If traction is poor even on moderate slopes with good treads, a drive motor may be weak and require replacement.