For starters, get rid of dead weight and people who skate by while doing little to no work. Show some appreciation for those who put in work, and hire people who do their job, period.
I would make sure everyone is doing there job according to how the customer would like his vehicle detailed. I would make sure that any task would be completed in a timely fashion.
Not make employees fear on a day to day basis that they will let go and spend more time training associates.