I finally got him to eat(after about 3 weeks of struggle). I just ended up throwing more crickets - about 2-3 at a time - in there at once, and he eventually found his way to them. I've only seen him eat two total in the two times I've managed to get him to eat. The first one he didn't finish & spit out almost the entire cricket (he ate some). That was a few days ago.
Just now I found him eating a second one. It seems like he's eating the whole thing this time. I've also attempted to feed him superworms, and have a small dish with a couple in there to see if he would eat those instead. He hasn't touched those, though.
Do you think he's still adjusting?