Rat Poop

My new job is to take over for a math teacher that has been moved to an instructional coaching position. She has been in the same classroom for 10 years. Teachers, probably more than in any other occupation, accumulate stuff. Books, manipulatives, posters, calculators, magnets, ... stuff. This particular teacher seems to have had a problem throwing things away. Even broken things. In the classroom there is a tall cupboard with shelves, like a pantry. Today after school I was trying to get it cleaned out. (This teacher keeps telling me she is going to come and move the rest of her stuff, and nothing has moved an inch.) So I started at the top, cleaning out and organizing things. There is a Toshiba laptop with all the cords and a nice bag. There is a broken stereo speaker and a bag of unidentifiable, miscellaneous cords. There are paper bags, grocery bags, gift bags, garbage bags. Napkins, random plastic utensils, a razor blade. You get the idea. It hasn't been cleaned once. I got to the bottom shelf and was digging out paper bags when I got to some that had been chewed. I could actually see the little rat teeth marks. Very cautiously, I knelt down and peered in to discover droppings. I got a paper towel to swipe out the remaining garbage, fully expecting a rat to jump out at me. Fortunately, all I found was two boxes of VHS tapes from roughly 15 years ago, one of which was actually glued to the shelf with rat piss. HANTA VIRUS!!!! my brain is screaming. But I can't stop cleaning it... nobody else is going to do it and now that I know it's there, how can I live with it?? So I sprayed on a LOT of the industrial strength cleaner that was also in the closet, and let it soak. The stains didn't come out.... ugh.