I thought i'd share this tip with you all in case it may be useful. I keep my smokes in a small cabinet which I built but was having trouble keeping the humidity up. My apartment is very dry. I bought one of those coffee cup warmers and put it inside the cabinet. I ran the card out a small whole in the back. I put a small dich of water on it and when i see my humidity dropping i plug it in. Within about a half hour i can get it up where i want it. I am also going to try using a timer to turn it on and off automaticaly.
Hope this helps