Home Forums Gear Knives and Blades How do you store your good fixed blade knives?

I've always stored them in their sheaths, but every few years, I need to clean all that green crap off the brass where it contacted the leather. In fifty years of having this kind of knife, I've never had a spot of rust from storing them in their leather sheaths, but I do constantly battle that green crap. Is there a product or some trick to keeping that off the brass?