In the middle of our wash process we use a high-pressure system to spray down vehicles and remove some of the preliminary chemicals and dirt that have accumulated on the surface of the car. More sealants and waxes may be administered after that rinse, so we must use only the best process to remove stubborn chemicals and foam at the end of our tunnel. This is accomplished by running our rinse water through a process called reverse-osmosis, which filters out any pollutants that are commonly found in city supplied water. By doing this we create what is known as a spot-free-rinse, where the water we apply to the vehicle to remove all soaps will dry without leaving water spots on cars. We apply this rinse generously in a three bar pattern in an attempt to flush out any soap hiding in weather stripping, and give the customer our best effort towards a sud-free car.