I live in East Texas where it is very humid. I don't have a problem but then again I keep a close watch on my arms. I used to keep my dies and other handloading equipment in the garage but they rusted. They are now in the house in a dresser drawer and on a closet shelf. Are you by chance one of those unlucky people that cause things to rust simply by touching them? I've known some like that. They can touch something and it will have rust on it the next day unless it is immediately wiped down.