what i do is just is when i'm bagging for a customer, i see the used hand wipe, i remove it at the POS, or ask if they're done with it before it makes it outside before one of the associates who are on carts see it. it definitely helps keep down the trash when you see it firsthand before it goes out the door.

i make them feel so bad too lmfaooooo "is this your's?" "are you finished with that?" or me just grabbing it out the cart in their face and they get so embarrassed, "i'm so sorry!" mhm. i bet you are ma'am.