I see “car washes” for supermarket shopping carts are big news, as are horror stories about all the filth that accumulates on the rolling wonders. As always, I gotta marvel at a country that can work itself into a lather over germs on innocuous necessities while never stopping to think about what might be breeding on dollar bills, let alone quarters. From that subway bum’s shit-encrusted pockets to your Purelled hands. . . .