Replace the filter bag when the orange marker in the airflow indicator fills the display. Open the dust compartment lid and lift it until it clicks into place. The Filter Bag is equipped with an automatic closing flap. Remove the used filter bag and insert a new one. Unfold the new filter bag inside the dust compartment, then close the vacuum lid. The two filters should be replaced each time you begin a new box of AirClean 3D Efficiency Dust Bags. In this video, we will demonstrate how to change the filter bag and show the locations of the pre-motor filter and the exhaust filter.