[BoomerSooner]

For a simple $100.00 monthly fee, plus $5.95 S&H, I'll gladly provide you with the necessary materials to ensure you are using only the freshest whistle guaranteed to be free of fungus, bacteria, and all other whistle infecting lifeforms.

Of course you would have to get used to a brand new whistle once a week, but at least it would be clean.

My secret is actually a combination of a couple of things. I will use the mouthwash soak when I want a quick fix (i.e. on the way to a game. I actually have a small bottle that I use for this purpose), but for the "good treatment" as I call it, I soak it in a diluted bleach bath (2 parts water per 1 part bleach), and then run it through the dishwasher. Try to do this one overnight with a run through the dishwasher in the morning. Nice and fresh and bacteria free by game time.