I went into the safe to check on something and while in there I noticed a thin layer of rust on the top of the barrel on my 96FS. I've had little spots of rust from time to time on my other guns that had built up after long periods, but this happened over only 4 or 5 days. I'm not quite sure how this happened or how I ought to go about preventing it from happening again. It was cold in the room so I suspect condensation formed, so I'm thinking maybe those moisture packets might help, and I've heard oil helps to keep the rust away, but other than that I'm at a loss for what to do.

