Originally Posted by semtex

Don't some brushless car wash places recycle their water? I'm pretty sure the places around me do. Point being, they're recycling the water they previously sprayed all over hundreds of cars prior to yours. It runs back into their drain, and gets reused. I don't know how good their filtration is, but I'd be concerned about getting the rinse water from other cars, along with the dirt that came off of them, sprayed all over mine. Granted they mix in soap. But still, what if there are leftover dirt particles in the water? Soap isn't going to magically cushion those particles when they hit your car.