You can always try assist feeding. Basically get a f/t hopper and put it in its mouth. I will push the mouse into its mouth and then gently push the snake's jaws together to get its teeth to dig in. This makes it harder for it to spit it out. 90% of the time they'll lay there for a minute or two and start swallowing. the other 10% refuse and I try again a couple of days later. Never had one take more than 3 tries.

Most I only have to do this one time and they're eating on their own after that. Some it takes a bit more.