HEY GUYS: TRY PLANO V.C.I. INHIBITOR PLUGS !!!THIS ONE PRODUCT CHANGED ONLY ONCE A YEAR ALONG WITH A ROOM DEHUMIDIFIER IS ALL YOU NEED! 13 YEARS AND THEYR'E ALL I'VE USED AND NOT A BIT OF RUST ON MY GUNS IN MY SAFES. I'M AMAZED NOONE HAS MENTIONED THE V.C.I. INHIBITOR PLUGS SOONER. P.S. I ONLY USE ONE 12 GA. PLUG PER SAFE...NOT ONE PER GUN! TRY IT, IT WORKS. JERRY