I heard the best thing to do when you get a new car is to tell the dealer not to wash it, so as they won't put swirl marks all over it. But once you get the car, what is the best way to wash? If I take it to a wash bay where you use the wand to wash it, is that safe? I would not use the brush, as there will probably be dirt in it. But just using the wand to put soap on, and rinse? What do you think?