Designed for flushing away dirt and odor-causing bacteria in AC ducts and filters with a cleansing foam. Safe on plastic and painted metal surfaces. Extension tube provided with the pack to ensure complete cleaning with ease. Switch off the air conditioner. Spray into coil and duct through louvers and vents so that the cleaning foam fills up the cavity. To do so, put the tube inside the vent through the louvers, and while keeping the trigger pressed slowly pull the tube outwards. This will cover the vent completely with foam. Also, spray into the air vents located outside near the engine. Allow the foam to work on the dirt for about 5-10 minutes then switch on the blower which will help break the foam and flush off the dirt. In the box: 500ML Can with Spray Tube