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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.
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