I went to local Blue Beacon Truck Wash and just watched. I decided to go home and wash the motorhome myself. Blue Beacon has about 6 guys with high pressure hoses washing the trucks. I was afraid of the high pressure tearing off some decals, calking, breaking vents on top of MH. I came home and washed it in my driveway. Did not get on top to wash the roof completely but got as much of it as I could with long handle brush. Maybe some teen ager will want to earn 25-30 bucks and will get up there and wash it for me. I also use Turtle Zipwax.