I am having trouble keeping crickets alive after I get them. I keep them under my bearded dragon tank, its always in the 70's under there and dark. I keep cricket gel and food in 2 shallow bowls, and I keep cardboard eggshells in there also. I only keep about 4 dozen at a time. Any advice would be helpful. (note: I just started keeping the eggshells in there, could them not having a hiding spot cause death?)