Replacement Filter Hepa Filter For iRobot Roomba 700 Series 760 770 780 790 It's best to replace your spare parts every 1 to 2 months to keep your home vacuum cleaner operating at peak performance. We recommend that you clean for iRobot Roomba Spare parts every 1-3 uses (depending upon the amount of dirt and debris in your home). This innovative counter-rotating fliter extractors break down debris and lift dirt while the brushless design is virtually maintenance-free. Reduces infiltration of dust, pollen and other allergens into the air you breathe