That is the most DISGUSTING chip I have ever seen! I thought I had seen some pretty nasty ones from off-strip LV casinos - but your chip takes the prize.....ewwww
I'm amazed you even let it ride in the car with you, I'd have made it stay in the trunk!
To say the least, I can't imagine any debate on whether to "clean or not to clean" on this chip.
BTW, is your tetanus shot up to date?