A new study looked at germs on different forms of payment mechanisms and how they compare to some of the more disgusting things we can think of. And while little compared to a door handle of a McDonald’s in New York, or to a city parking meter, the credit cards, bills, and coins we use may be more germ-laden even than the bathrooms at New York Penn Station or a New York subway pole.
Testing “40 debit and credit cards, 27 different bill denominations, and 10 coins for germs” each surface “was swabbed with a handheld germ testing device and assigned a ‘germ score’ to rank the item on the disgusting scale.”