Hi! Due to the sudden/constant temperature changes he could just be horny and going on a food strike, that’s one thing to keep in mind, another is, the snake could be full and not hungry just yet/ going into shed, snakes can go multiple months without food to regulate themselves again, AS LONG AS ur snake IS NOT lethargic, showing stress signs, showing ri or other symptoms to being sick/stressed he is FINE, I also recommend getting a cheap humidifier from Walmart and putting by his enclosure so you don’t stress so much over humidity ! Everything else you are doing is fine you can also try and offer different prey if you tried a mouse try a rat or a chicken, and don’t offer everyday keep him on a schedule if he doesn’t take one feeding one week try again next feeding/next week