Is he dying????????
The pet store had him for about 3 weeks and he ate fine, last week he ate fine, last night he didnt eat, was not interested, i did exactly like you said, put it in the small deli-cup put it in a big brown bag to keep it dark and he just didnt eat, i brained, nothing, i treased, nothing again.
I also need to say, i have been misting him twice a day, put a small cup with paper towels and its not working....
I do have to admit that i cant leave any light on (stict rules) but the room temp alone seems to be doing, i only have a thermometer on one side as i have no heat, i didnt i would need another for the other side. His skin got looser and to me he looks extreeeeeeeeeeeeeemely skinny, So PLEASE, what can i do, things are comlicated for me right now if i were to take him to a vet, coz i have 3 sick cats, with pneumonia or herpes or something the vets can;t tell, so im going back and forth and trying to get to work and all, so its all a mess, last thing i need my snake to be dying.