6. Car Wash Tech

Better roll up your windows and put it in neutral as we join the 2 million people who wash their car every single day! From one of the largest car washes in the U.S. to cleaning radioactive waste off a train to tips on getting tar, glue, egg and sludge off your priceless Porsche, Modern Marvels takes a look at all the awesome technology we use to keep our beloved vehicles sparkling clean.