I've been pondering ways to avoid using dampits (or any other internal humidifying gadgets) this winter, and I think I've come up with something. Like some others, I often have to store my instrument in a trunk/locker type setup, in a dry area where I can't use a humidifier (as in school). The trunk is one of the older kinds (the tall trapezoidal types with the little shelves on each side of the neck, and even small spaces beneath the instrument. What I'm considering trying is getting two tupperware containers and putting sponge (or another material) in them, and then covering the sponges with water. then placing them in those little side 'cabinets.' Assuming that there is some type of transpiration from the sponges, this might bring up the humidity inside the trunk. If I could get the trunk up to 40%, that would be pretty good. Since the instrument has to stay there overnight, the instrument might be able to gradually regain some of the humidity it loses during the day being out and in dry buildings. Luthiers, more engineering-minded types, what do you think? Could this potentially work?