I live in the bowels of hell, I mean Arizona and the season is starting to change. I live in a very old home with exterior walls made of cinderblock and interior walls of plaster (very had to keep cool in the summer). During the summer when I was running the swap cooler (we don't have AC) I had to turn the thermostat all the way up during the day and then kick it back a bit at night to keep temps within range. Now that the cooler months are starting my temps are fine but my humidity just dropped way low. I'm misting like a bazillion times a day, my home-made humidifier isn't helping any, and I just don't know what else to do. Every week I re-moisten the substrate (forrest bed) and it's fine for about two days then it dries out really bad. It didn't do that during the summer months. It would stay good and moist for 5 or 6 days. I have Shikara in a 40gal glass tank with a dual sliding screen top. On the hot side I have a UTH and a 100w CHE. I cover the cool side with a towel (covers 2/3 of the top). He has two hides, one on each side. There is also a ceramic water bowl (over the UTH) big enough for him to curl up in and a small tree branch for him to climb on. I measure the temps/humidity with an acurite digital 3 in 1 from walmart. Any ideas on what else I can do to keep my humidity up? I'm concidering buying a room humidifier but I'm not sure which one would be the best to buy. Any thoughts on that?