I don't go to the self service places for a number of reasons. The attendants don't like people bringing their own supplies. I've had them ask me not to use my own stuff even if I am paying to use their water. It was also a PITA
to try and get water in the bucket. The only water was high pressure and it either knocked the bucket 7 feet away or just blew everything out of the bucket. So I choose not to go to these places anymore. Too much aggravation. I also don't like to feel rushed when I wash my truck.