My Pacman Sir Hopsalot is extremely stubborn when it comes to eating.

I'm trying really hard to have him try out new foods.

He literally spit out wax worms. He wont even attempt to go after Nightscrawlers, all he eats is Crickets. I want to give him some type of variety but he doesn't want to try anything!!

Is there anything else I should try? Maybe feeding tips? I tried separating him in a different tank with no substrate just for feeding, but I feel like it just stressed him out, he hops away and shoots water.

Edit: I've also tried starving him a bit. (Just 2 days)