1. Power off the robot and put it on a desk.
2. Prepare a glass of boiled water, and take off the bent side brushes.
3. Put it into the water, wait for 10 mins and take it out.
4. Use dry cloth or paper towel to straighten the brushes and install it as it was.
5. Note: if the brushes are seriously bent or damaged, and cannot be reshaped after these steps, it is recommended you replace them with a new pair.