ALWAYS feed snakes where they live- never move them to eat elsewhere. Shy feeders may stress out & refuse food after even minimal handling, & not-shy feeders may be biting you before or afterwards, since snakes can stay in "feed mode" for hours or a day or longer.
DO NOT FEED HIM ON A PAPER TOWEL! (I'm SO glad you mentioned that though.) Paper towels easily get dampened & caught up with the prey, & may require surgery to save the snake from the undigestible blockage in their gut. Never feed a snake on soft paper or any kind of fabric- but DO put down a piece of cardboard or a plastic box top, or a real plate- anything he can't ingest accidentally.
If his instability (corkscrewing) was caused by excessive heat, I suppose he might gradually improve, but it's impossible to say. If it was just from his overall weakness & disorientation, it "should" improve. But of course, it could be other things that won't get better- we'll hope for the best, right along with you.![]()