I get my car washed as part of a combo with the mechanic on site that does oil changes. Parking near the vacuums someone usually comes over to ask which option you'd prefer and you get a receipt. Entering the store front is where you pay for the service and on the other side of where you dropped it off is where it comes out. The wash here is decent most of the time depending on which person does the detailing. if you have any issues, point them out and they take care of it before you leave.