Replacement Filter Hepa Filter For i Robot 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 operating at peak performance. We recommend that you clean for i Robot Roomba Spare parts every 1-3 uses (depending upon the amount of dirt & debris in your home). This innovative counter-rotating fliter extractors break down debris & lift dirt while the brushless design is virtually maintenance-free. Reduces infiltration of dust