How to protect humidors from winter dry ??

Something elese to consider is the chemicals in kitty litter.http://koinonianetwork.org/profiles/...tter-encounter
IMO Kitty litter may not be what I would go with.

It can also cause mold from being stored in a dirty store stock room, or in a nasty trailor ride to the store, or from a humid warehouse floor.

Water on kitty litter just like anything else can cause microbal growth espically in a dark warm humid enviroment (IE a humidor). I recommend Xikar gel jar and distilled soultion ( changing up the refill soultion every other bottle also helps fromwhat I have hear) and I can't get over the mental issue of "this product was meant to hold cat turds" and the metal image of a cat turd next to my worst dog rocket is an unappealing image.