I lived this life in the mid 90s, a year at the local Jeep dealer and 5yrs for Toyota.. A filthy car is the 19yo min wage lot persons job who has cars lined up out the door waiting for delivery. Ten salesman riding their ass to hurry up all with a belly full of shake and burger. Now the PDI is a new car inspection before the customer ever sets rear inside vehicle. Tire psi, mirrors installed, fluid levels, test drive, system operations, body plugs, suspension blocks, wheel trim. I did about 15pdis/wk for about 4yrs. Loved them!!! 1.4hrs flat rate each and took about ten min/car. It could be done differently now but there's multiple levels of failure throughout all depts when something isn't right at delivery. Back then if we won the presidents award, they would charter a bus and take us all to a Seahawks game. Talk about incentive to do it right. 300mi of heavy drinking then party at the King Dome, all for free. There's no incentive anymore other than volume. I go in with zero expectations and fully expect I will be detailing and double checking everything they were supposed to do. But if I get a good deal I'm fine with that. I actually prefer it to be honest. Less they touch, the less I have to worry about them damaging.