Roomba s Series: six steps to clean rubber rollers and end caps
Use iRobot's s Series instructions to remove hair from roller end caps and the vacuum path.
iRobot's Roomba s Series rubber-brush maintenance article
Official Roomba brush maintenance link
Open source ↗This applies to the Roomba s Series; other generations have different brush assemblies. iRobot recommends at least weekly inspection, or twice weekly with pets.