I have a Wash Select II and I would like for the customers to be able to pay, but not enter until my dryers shut off. The dryers are outside the bay so the car will clear the T-Bar eyes and the machine will reset for the next car while the dryers are still running. I was thinking if I could have a relay that energizes for the dryer signal but opens the signal to let the next car come in. Does anyone know how or a better way to do this?