Did you reactivate (dry out in an oven) the silicagel before storing the cameras? A silicagel packet will not absorb water indefinitely, it will soak up a certain amount and then it's just like a wet sponge. Anything stored with slicalgel needs to have the packets reactivated every few months or so, depending on conditions.
Originally Posted by Steve Roberts
The trouble with sealed containers is that they keep things in as well as out.