Look below the dirt container at the front of your vacuum. Directly below the container sits a tray comparable in shape in size to a coffee filter holder.
Pinch the recessed sides of the tray and slide it out. Inside the tray sits the foam pre-motor filter. Reach inside the tray and remove the filter from your Bissell vacuum cleaner.
Fit the replacement filter inside the tray. Slide the tray close.
Look for a rectangular-shaped door on the side or back of your Bissell vacuum.
Push the tab down near the top of the door down and swing the door open. Inside the compartment resides the post-motor HEPA filter. Grasp the filter and remove it.
Press the replacement filter into the compartment. Push the filter door close.