I was using my shuffle last night for a couple of hours, while inside its Altoids case. When I opened up the case, I found water vapour on the shuffle and on the lid! It seems that the heat emitted from the shuffle led to condensation inside the case! Naturally, I was worried about the shuffle, because if water gets into it, then that is a problem. I tried it again, and it seemed to work okay, but I will give it a few days. Has anyone else experienced this problem? Is it just a problem with my shuffle?
Throw a bag of silica gel inside the case. They're the little packages you get with cameras, etc, and usually say something like "do not eat" on them. Although you shouldn't eat them, what they do is eat moisture.
If you can't find one, I would just ask nice and friendly-like at a camera store if they have any laying around. You can buy them at hobby stores sometimes, although the price is outrageous, considering, (a kilo in a bulk package is worth about $3) it's only a couple of bucks, if that.
If they turn brown (or at least the stuff inside looks brown) they've eaten their fill. Pop them in an oven at the lowest possible setting for a few hours and they will be good to go again.