I think the 30-40 second range is good. That's plenty of time for the customer to do his car enough to strangle himself, but little enough to prevent giving the hose to another customer to do their car.
I don't agree. I say that because I've watched customers at other washes when they only get 30-40 seconds of time for fragrance. One in particular I remember put in his money, grabbed the gun and turned to his car, but the
door was locked. He fished out his keys and unlocked it, then he couldn't find the button on the gun. About the time I heard the solenoid click when he pressed the button, it ran out of time. He looked pretty disgusted and just dropped the gun on the ground.
IIRC, the machines were set to 40 seconds when we opened. I turned the time up to 50, then one minute, then 1:10, until I saw at least half the customers hanging the gun up with time still on it. (Notice I said "hanging the gun up," not "dropping the gun on the ground".) Even at 1:10, there's not really enough time to pass the gun between two vehicles unless they plan it deliberately, and I've never seen anyone try.
I put in a stand alone Fragramatics frag machine and was wondering what others are giving time wise per cycle? I have mine set to start at $1 and was giving around 44 seconds per $1, but then dropped it down to 32 seconds and now to 28. The gun shoots out a very strong stream, so I figured that not much time is needed. What are you guys doing?
If you've turned the time down so much because there's no button on the gun and you don't want to waste fragrance, I'd suggest adding a solenoid and replacing the gun with one with a button.