11. THE FLOOR IS NOT PERFECTLY DRY
Possible cause: not using the broom at the correct angle.
1) If the problem persists, check the wear and damage of the rubber brush head. If damaged or worn, replace it
2) Release the the brush head by moving the sliders to the outside
3) Remove the brush head from the casing
4) Remove the rubber from the brush head
5) Insert the new rubber strip