RectorSeal 82560 allows cleaning of air-conditioning indoor unit. Take out the Center Insert, wrap the Red Cords around the unit, attach the Metal Ring to the Center Insert Clip. Slide Left and Right Corner Brackets under the back corners of the unit and tighten them. Lift the C-Band into position and attach the single-use Funnel Bag to the frame by rolling it over the C-Band from the inside. Apply Desolv Cleaner per instructions. After cleaning, roll the entire assembly into the Drain Pail and separate the bag from the frame. Replacement Funnel Bags are for single use only.