You might try skipping a week of no food item interaction then reintroducing a f/t or pre-killed (its part of keeping reptiles...you can do it) to the snake in a confined enclosure such as a small covered tub...or some people have used paper bags. I would personally suggest a small tub in the evening covered so no light reaches inside. This has worked for me so many times in the past, most recently with a tiny hatchling children's python.