I used to get that also, and I am sure there are many others here who have and still do. I found a way to take care of the problem though. I work for a very large company and our division produces oil seals. Some of our seals and sleeves will become rusty while in the boxes if stored for long periods of time. Some of them require a moisture absorbing material called VCI material. It sucks up any moisture that gets in the box and totally prevents the formation of rust.We have it in different sizes from 1" x 1" chips up to 5 ft square sheets. A few years ago it hit me to put a few pieces in my bow case to see if it helps. Well, I haven't had a hint of rust ever since then. It is pretty cool stuff.