Dehumidifer for camera gear – BigBen08 shares a great tip on keeping your camera, lenses and other photographic equipment free of the ill-effects of high humidity.
He uses a combination of Eva-dry Renewable Wireless Mini Dehumidifer and Rubbermaid-type plastic container for this (he reveals that he uses model 300 as it's the smallest size Eva-dry unit).
mrsfixit talks about how the unit works and an alternative method:
It contains no fan.
You put it in with your gear, then when the crystals turn pink, they need to be dried out.
You plug the device in, and obviously it has some sort of heating element inside that dries the crystals out again in a few hours.
Of course, there's no reason you couldn't just buy some "indicating silica gel" and make your own device.
I was thinking of doing that. It isn't that expensive- around $20 or so for 5 pounds. I was thinking that putting some in a woman's nylon "knee high" or even a sock might work well.
Then when the crystals turn pink, then put them in the oven for a few hours to dry out and you're good to go again.
BigBen08 points out that the Eva-dry makes the whole process more convenient, and at a cost that's not prohibitive, when compared to the DIY approach:
… with the Eva-dry you don't have to mess around with all that. It's compact, clean & simple. Can be resued hundreds of times. And only about 15 bucks.