First, a propane camp stove for heat is a good way to get carbon monoxide poisoning and adds a lot of moisture to the interior which will condense out and help cause mold/mildew problems. I hope you have a CO detector aboard, along with a propane fume sniffer.
I do have CO detector. I use the propane sparingly and I open the boat up during the day to dispense the moisture. I throughly clean the interior surfaces often. Ive even washed the lead ballast. Two girls caught pnumonia after separate stays on board so I cleaned every part of the interior I could reach. I run the bilge ventilator daily as well. Im doing my best preventing explosions, suffocations and unhealthy conditions.