Camp’s Car Wash Gentle Touch Car Wash They advertise $3.00 on their self serve machines but when you swipe your credit it goes to $5.00. Nashua New Hampshire!!. When I went to their self service car wash it says $3.00 on the cscreen but when I swiped my credit card it jumped to $5.00. Plus, I went to 3 different bays and when I swiped my card it was declined. I actually tried three credit cards and they were all declined. The fourth bay finally accepted my card. The self service bays are not being kept up in an acceptable manner.