I agree with Bogertophis that something sounds off. Corn snakes are usually garbage disposals, even if somewhat shy. I have two. Solana, my younger corn is a little shy and usually doesn't strike. I leave the F/T mouse for her and as soon as I walk away, gone. However, she doesn't miss meals unless in shed.
I would be checking temps on the ground with a temp gun. Room temp if 75F is fine for the cool side, but warm side should be 82-84F or have a heat pad (thermostat controlled) that's 82-84F.
IMPORTANT
If you work in a nature center you should incredibly careful with your own pet reptiles. If I recall, you just got a BP, correct?
You should assume every reptile at the nature center is sick. That means changing clothes, washing hands (and preferably body as well) before handling your BP or his food.