Silica Gel

A friend of mine this morning gave me a useful advice for my pocket camera.

He believes that the level of the air's humidity can affect the life of my pocket camera..

so...He gave me a package of...silica gel!
He said that I should put that in some air-vacuumed place with my camera. Initially, they were blue, but as time goes by they'll turn into violet. When that happens, We should Heaten it until it turns blue again.

nice advice..ThX!