I just fold the filter in half. Paint side out. And put them in a gallon size baggie. Pour the cleaner in. Seal it and let it soak for a few days. Take the filter out and rinse it. press it so the water comes out and let it dry. And yesterday. I was vacuuming the room and the used filter was laying there. I vacuumed the filter and a lot of the paint sucked off.