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Originally Posted by eeyore  also keep some little packets of silica gel in your lens pouches - this will absorb any moisture that gets in and stop the lens from winding up with water inside (pro lenses are weather proof but the cheaper ones arent) - if a lens gets water inside it it is pretty well guaranteed to steam up at every possible opportunity. |
The silica gel will need frequent activation if it is constantly exposed to moist air. Put it into the oven at around 200 C. You'll need to do this very frequently - probably at least once a week if used in a non-sealed container. You also need quite a lot of gel - the teaspoon or so of gel provided with some items is pretty well useless! Ideally you should also have an indicator with it. Paper soaked with a solution of cobalt chloride (and dried) will show pink if the silica gel is exhausted and blue if it is active.
Jim