Cleaning the Multi-Surface Brushes
| Pinch the brush-frame release tab, lift the tab and remove any obstructions. |  |
| Remove the brushes from the robot. Remove the brush caps from the ends of the brushes. Remove any hair or debris that has collected beneath the caps. Reinstall the brush caps. |  |
| Remove any hair or debris from the square and hexagonal pegs on the opposite side of the brushes. |  |
| Reinstall the brushes in the robot. Match the shape of the brush pegs with the shape of the brush icons in the cleaning head module. |  |
https://manuals.plus/irobot/j7-roomba-robot-vacuum-cleaner-manual#ixzz7qWSmHFPx