Eating in a Grocery Store

I'm not typically surprised or bothered by customer's actions in my store but every so often they'll get me.  Lines got a little long and I told the next customer in line I could get them at register 4.  I recognize this lady because she always comes in and seems completely exhausted so I wasn't all too surprised when she had an empty deli container on the belt.  

Me:  Uhh, do you want me to throw this away for you?

Customer:  Oh yeah, and I ate this too.  <Holds out hand and reveals peach pit> 

<<HANDS ME PEACH PIT>>

Me:  Ummmm

Customer:  I ate a peach too

Me:  I don't understand what you want me to do with this.  (We sell peaches by the pound and without the peach, I can't charge her for it properly)

I'm still holding the peach pit because I can't believe she thought that was appropriate and she ate it without ever washing it off?!?  The produce manager has to handle rotten produce all day and sometimes it drops on the floor.  Produce should always be washed.

I finally threw the peach pit in the garbage and put a bottle of GermX on the scale to charge her for a 1.5lb peach.