Your husbandry sounds good, maybe just lower the humidity to about 60% and bump it to 80% when it goes through shedding cycles. It sounds as if it may be scared, try not handling it so much. I would try feeding by leaving some food at the entrance of it's burrow, just to avoid handling every day. Also, what is the ambient air temperature of your hot side? If it is hot, it will stay in its burrow to try and keep cool.