I recently purchased some Superworms to feed to my bigger leopard geckos because there is a shortage of mealworms here except for those mini ones wich are just too small. I put them in the 3" shallow ceramic dish I put my mealies in but the superworms are crawling out. Is it the material that is why they are crawling out or is it that I need to go to the hamster isle and get the ceramic 3" dishes they have there that are about 1" deep instead of the 1/2" deep on the standard mealworm dish?