I used the car wash service several times. I live nearby. In principle, they wash diligently with foam, but there are always stains on the windshield from the inside. When you pick up the car, they are not visible due to the specifics of the lighting. The disadvantage is that the client is uncomfortable. No waiting room, nothing... Or you sit stupidly next to me on a bench or walk around the nearest shops. I have something to fuck with, a friend has his own car wash. There's coffee and TV for you. It's just a long drive.