I love it when customers think they pull one over on me by handing me crumpled money or old money.
I love watching when they go through their wad of cash, looking for the most beat up bills they can find, and then slowly plucking them out of the bunch and handing them to me.
It's also funny when someone tries to disguise the fact that they are giving me a bill that's ripped or missing corners. They try to hide that bill in between others that are fully intact.
But it's okay, I always notice these things.
So when I'm giving you your change back after you carefully took the time to give me the shittiest money you had, I am taking my time looking for the crappiest and grossest coins I can find.
So don't be surprised when you get back a coin with a mystery substance on it. I may make it look like I don't notice what I've giving you, but I know exactly what I'm doing.