Never clean vinyl trim with detergents, caustic soaps, or kerosene-based cleaners. Simple soap and water work just fine, and a soft brush can easily remove stubborn grime. Wash your vinyl trim as often as you clean your entire car.
After cleaning, the use of high quality rubber and vinyl protectors will help prevent oxidation and cracking. The protective agent can also be applied to glass seals, vacuum lines and rubber hoses, which often fail due to chemical degradation, as well as tires.