@_kenjyyy: How to use Marsh air conditioner cleaner: 1. Make sure your engine is off 2. Shake before you use it 3. Plug all hoses of this product into the air outlets 4. Press the nozzle and dont let go and at the same time slowly pull out the hose 5. Wait for 10-15 mins the foam will melt 6. Adjust the air speed to the minimum setting #Marsh #GlassCleaner #MarshGlassFoamCleaner #ClearGlass #FYP