i think a high 70's-80ish ambient temp is fine. feeding him in a separate tub might be the issue and is probably stressing him out. also how are u prepping the f/t mouse? is it fully thawed and warm enough for him to recognize as prey? give him a couple days, warm up a nice rat and offer it to him in his tub when u see his head poking out of a hide or him roaming after dusk.
Was gonna say this. Try feeding him in his living enclosure, with something under the prey to keep the substrate from getting in/on it. I had a problem feeder who refused to eat outside his tank, and for good reason: it's completely unnecessary!
0.1 Normal Ball Python
1.0 Southern Black Racer (permanently disabled)
2.2 Cats
0.1 Dog
RESCUES I'VE FOUND HOMES FOR:
1.1 BCIs
2.1 Ball Pythons
1.0 Black Pastel Albino Ball Python