I have found a way to eliminate clogging on virtually every whistle I own. I take a bite of green persimmon between every tune or two. Your mouth stays so dry, your spit comes out in dust form.
YOU ARE A GENIUS!
Of course I have heard most geniuses should be committed. 
Oh, I’m very commited.
Isn’t it said that the line between genius and insanity is very blurred 
Green persimmons???
Talent does what it can, genius does what it must.
I’ll keep drooling, thank you.
I’ve been doing some research and have found a substitute for fresh persimmons. Persimmon Cola, Green Persimmon Yogert, a medium Green McPersimmon Shake, Persimmon Bel Grande, Cap’ D’s Persimmons and Chips, or Quaker Oats Green Persimmons and Ginger flavor instant oatmeal. I havn’t tried the Persimmon Newtons, Low Carb Persimmon Beer, or Dairy Queen’s Persimmon Flurry yet.
Sir Vomit,
As one who is fairly familiar with the effects of the green fruit would like to caution you to tread carefully.
If you continue to eat large quanities of the afore mentioned item you will begin to “turn inward” as it were. This process will continue until only the tips of your ears remain and I have found it extremely difficult to get a good sound using only my ears for the air supply. This is not necessarily true if you are a politician … they seem to have an abundant supply of hot air “oozing” from all of their body openings.
So … just thought I would throw this in … I value your comments … and would hate to loose them while while you were attempting to better the world of whistling.
Jim