appearance attendants brushed brushes carwash clean cleaners cleaning conveyor conveyorized drying equipment fixed cleaning mechanisms high pressure water streams human greeter mechanized mechanized car washes mitters nozzles protectants recycle reuse rinse rollers soaps soft cloth track trickling tunnel entrance tunnel exit tunnel washes vehicle wash stations washing processes waste-water water water reuse window windscreen wraparounds drops hitting puddles rain running down splash splashing spray spraying weather wet winter wintry