Now I know this question has been asked a million times, but should I wash my car with dish soap? I want to strip all the old wax off my car and redo everything. I've read that it does something to the rubber? Is this true? I have a foam sprayer with my pressure washer but I never use it when I wash the car. Is it a good idea to spray the car with dish soap with the foam, sprayer, rinse the car, and then go ahead with my normal wash?