I have this $100 electric power washer that I have always used to wash the car. However last week I got the car all perfect and polished and Im trying to wash the car the autopia way. Does anyone use one when washing the car? I keep it on the lightest all most mist setting when washing the body and then for the wheels and wheel wells I keep it at a little tighter pattern. If the car gets caked with crap. Is it a bad idea to decress the spray pattern to a sharper strem (not to a point or anything) and try to knock the dirt off before washing or will that cause maring? Any other ideas. Thanks!