Americans hit the car wash 2 million times a day--at a cost of $25 billion dollars a year. From tunnel systems to in-bay automatics, we'll go beyond the suds to see how car washes are built to clean. We'll get wet inside the largest car wash in the U.S.--a seven acre mega facility complete with a dog wash, chapel, and barber shop. We'll head to a car wash manufacturer where electric eyes are trained, auto conveyers are built, and mega vacuums suck up bowling balls. We'll learn some tips on how to clean our cars at home. Watch as we plaster a $160,000 Porsche with tar, glue, egg, bird droppings, and a bucket full of sludge... and then challenge a detailer to get it off. Cleaning radioactive waste from a train? No problem, if you go to the Energy Solutions rail car wash. Then, it's off to see how car manufacturers design and build vehicles to survive the car wash.