Living in hot and humid Thailand I keep all my photo gear possible in a Pelican case with four of these desiccant packs. 10-15 minutes in a microwave oven at a very low power is enough to dry them out for resuse.
Click to view larger image 2 pack Blue Indicating Silica Gel Desiccant Moisture For Absorb Box Reusable
Living and loving it in Bangkok, Thailand. Canon 7D - See the gear list for the rest.