I live in the blustery cold of the midwest, and during the winter, my humidor gets really dry. I swear that I can fill up my humidifiers every week, and the relative humidity only gets to the low 60's. I have an El Rey humidor that is mostly filled, and my humidifiers are the standard, round ones that I got with it (2 of them). In fact, I was so desperate to get more moisture in there that I put a small synthetic sponge in the bottom of my humidor in which I put some distilled water. Even that doesn't help much!
HELP! What can I do to bring up the humidity?