I-clean Replacement Bristle Brush and Flexible Beater Brush5 Set] for iRobot Roomba 500 Series 510 530 535 540 550 560 570 580 Vacuum Cleaning Robots Work better on deep carpet and Pet Hair than old Red version Keep your iRobot Roomba operating at peak performance! Compatible with Roomba 500 Series vacuum cleaners For best results, brushes should be cleaned every 1-3 uses (depending upon the amount of dirt and debris in your home) How to clean it: 1. Remove brush guard by removing both tabs. 2. Remove and clean the brushes. 3. Remove and clean hair and dirt from the yellow brush bearings. 4. Remove and clean the brush caps.