I use the little packets that were referred to in the first reply. I have a nephew that worked in a shoe store, and he gave me a whole shoebox full of them. I had more than enough for my gun cabinet, a handful in each of several ammo cans, reloading component storage cabinet, etc. A couple of hours spread out on a cookie sheet at low heat once a year keeps them soaking up the moisture indefinetly. A lot of different kind of stores throw these things away by the boxful.
Bergie