I recently built my 2 year old sulcata a night box. Heavy duty built like a house but insulated with R-30 insulation all the way around. I put a kane heat mat and an oil filled heater in there. It's perfect temperature wise stays 85 all the time even when it is 100 out. The problem is he won't go in or out of it on his own. I always have to put him up. Before I got around to putting the slit rubber for the door he would come out in the morning on his own. But now he won't. The roof is pretty heavy and my wife can't lift it on her own. I leave for work at 4am and it is generally too cold for him at that time so he has to wait until I get home around 2pm. We have tried coaxing him out with his favorite treats to no avail. Any advice on how to make him more comfortable with the house?