I probabally shouldnt tell you this, But I spray a little bit of WD-40 on a rag and wipe their combs. It was designed to repel moisture among hundreds of other uses. Its not made for frostbite prevention but repels the over abundance of moisture which does create frostbite. A word of caution on the label concerned me about continuous exposure. So far, no problems. I know it sounds crazy, but it works!