Only problem I see with accepting only dollar
coins is people dont generally carry dollar
coins. If you dispense them as change and they get say $5 worth of them and they use them all but could use another minute to rinse they may not walk back to a
changer for more, but if they can grab 2 more quarters out of the ash tray for more time they are more likely to do that. I dispense
tokens and love it. I make .75 on unused
coins, I accept quarters, dollar
coins,
tokens, bills and credit cards. The more ways to get the $$$ that people have on them is the goal. I run my triple foam gun and foam brush really heavy so it takes a while to rinse. Very rarely will you get a complaint about too much
soap!! But run light and everyone complains.