Turn the air purifier off. Unplug the power cord from the wall outlet.
Loosen the front grill retainer screw located on the front of the cabinet near the bottom. Press in the half-circle unlock button and remove the grill.
Grasp the two small handles on the right and left side of the filter cell. Pull the filter cell out of the cabinet.
Snap the charcoal odor absorber off of the back of the filter cell. Slide the pre-filter off of the filter cell.
Soak the filter cell in warm water in a bathtub or kitchen sink. Add a small amount of dish detergent to the water. Let the filter cell soak for three hours.
Remove the filter cell from the water. Allow it to air dry. Slide the pre-filter back onto the filter cell. Snap the charcoal odor absorber on the back of the filter cell.
Slide the filter cell into its compartment in the air purifier cabinet. Replace the grill and tighten the retainer screw.