Shake well before use. Thoroughly clean and remove any hard deposits, grime, soil and loose dirt from the surface. Rinse off thoroughly with fresh water. Let it dry. This will help quick penetration. Spray straight onto a foam applicator and apply on treated surface. If excess, wipe off with a dry cloth. If second application is needed, allow 5 to 10 minutes. Do not use product on tire treads! Always wash and treat car in shade and make sure that surface is cool to the touch.