Every few months dry out the silica by microwaving the box of silica!
When used in closed
places (where mold and fungus live and breed) silica gel whisks away moisture
to create a protective environment of dry air. It prevents all forms of rust,
corrosion, oxidation, mildew, fungus, mold etc. Prevents tarnish on gold and
silver. Put in your toolboxes to protect your precious tools from rusting. Drop
some in your camera bag to protect your valuable camera equipment. It even
protects expensive leather items like jackets, shoes, and boots. Also great for
tackle boxes, photo albums, computer media storage and so on.