Well, for now he wants to eat only mealworms so I'll give them to him few times in a row and then maybe he'll be more eager to try other things too.

Also, I forgot to spray his tub yesterday because of all the Christmas jumble and today he was all in dried up skin and hiding. I sprayed him immediately with water and now he looks like he will shed... hope it's normal and he will be fine? I certainly won't forgot to spray him in future as I was all terrified when I saw him today. He's now pretty mopish too.