Using a special grade of sandpaper also help? i use a very high grade to ruff up my calls is that the correct one to use?

Bo thanks for the link on that pouch thats a interesting tool to use and your right dirt and such do take a toll on the calls. I place them in a ziplock bag before they go into my vest but i might just invest in a slate pouch......hopefully my belt can hold all the weight when i attach them all lol