Parker-if you currently feed him inside his enclosure, I would change out the loose substrate to tile so he can see the crickets easier, being that he has trouble eating currently. Or feed him in a large plastic tub outside of his enclosure. That kind of loose substrate, the worms and crickets can burrow down into easily.
Do you feed him greens of any kind? He should be eating some greens, such as dandelion greens, turnip greens, collard greens, mustard greens which you should be able to find in your local grocery store.
Lastly, if you are in an area that gets sunshine this time of year, putting him outside and sitting with him, is another good way to get UVB, in addition to basking in his enclosure.