I would double-check all your care parameters again. I'm not saying that something is wrong with your parameters, but it's always good to double-check. I know I find myself in a transitionary period between summer and winter where my room humidity increases exponentially after I switch from AC to Heater. But once it starts to get colder and colder outdoors, the indoor humidity goes down. But in this transitionary period, I usually have to prop the door open to let the humidity out. But this only applies to where I live. Has anything in your husbandry changed recently?