Yeah, best not to move things around and stress him too much. BTW , I can't remember why you are trying for the higher humidity, is it to help with shedding ? Because 20ish is low but it's not unhealthy or anything. Another thing you can try to raise the humidity is to get a small plastic container and make pretty big holes all over it, like pencil sized , put a wash cloth in it and wet it very thoroughly. Keep it in the mid range heat zone. Add water anytime it seems to be drying out and wash it with dish soap and vinegar every week but rinse it well.