Amphibious Whistles

Lately I’ve been tucking my Susato Soprano D into my wetsuit leg and taking it out into the water surfing with me. Now I can practice while I’m waiting for set waves. I’ve noticed a problem though (barring the fact that when I pee in my wetsuit, it does run down my leg)- water drops from my fingers tend to stay over the surface of holes for awhile, hindering taps, rolls, crans, etc. I’m sure there are other amphibious whistles and whistlers out there- how do you deal with this problem? And what the heck are you doing taking your whistle in the water?!?