Women's Sweaty $$$$$

Well imagine my surprise this week whan a woman ordered her tasty beverage and pulled a sweaty credit card out of her jog bra !!!!! YEEEW Gross !!!!!!
Yes I apologize to men out there. I guess I hadn't run into a woman who would do this.
Also in the same week a woman who had been at a nearby Yoga studio pulled out a $20 from her bra to pay for her beverage.
"Oh I am sorry it is wet, I didn't have any place for a wallet" was the response.
It is getting to the point that I want to run from any "exercising" customer that comes in my shop.
What are people thinking out there?
Maybe I should try and experiment and tell them I will not accept any money that is wet.
Maybe a bank is allowed to do that. anyone know?

Have a dry Thursday
Coco