If he was in the box when he did it, most likely it was because it was dark, and he assumed it was bed time.
If he isn't shutting his eyes at all now, then hes fine.
WHen rooms go dark, they go to sleep.
Now- in regards to your husbandry- superworms are not a great diet for him.
YOu need roaches, crickets, etc as a daily feeders, with everything else being treat bugs.
SUpplements- you should be using a calcium with no D3 for every feeding, a calcium with d3 twice a month, and a multivitamin twice a month.
IF you bought he reptical from a store, it most likely has d3 in it, and youl have to order calcium with no d3 from a site sponsor, or other online source.
Misting- this should be done at least 4-6 times a day, twice is not enough to keep him hydrated.