every time I open the cage he kinda gets jittery. Right now he's sleeping at the top of the cage but not under the heat lamp, so I guess he's alright with the temp. I do have a thermometer and its at 80f near the top but he can get closer for more heat if he wants to. I have to run the heat lamp at night because my basement is too cold.

Is there anything I can do to calm him down and not get freaked out by everything?