Auto Preservation of Cary Car Detailing in Cary, NC recommends you use only approved car wash soaps and hand wax after 3 washes minimum! Clay bar system is recommended at least every other waxing to rid the surface of fallout and contaminants. Do not use dish washing liquid to wash your car. It will eventually cause damage to your clear coat surface. Use a chamois cloth or micro fiber towel to dry. Terry cloth towels will eventually leave webbing.