Great tip. I purchase a natural chamois and cut it into 2x2 inch strips. When the body of the fly gets too waterlogged I give it a squeeze with the chamois and the treat it with some Top Ride. I think it works. if a couple of fishermen chip in the chamois goes a long way and dose not cost much. I don't have experience with synthetic chamois like the ShamWow.
Seems like a lot of trouble when you you're wearing a shirt. My shirt, amadou or a piece of chamois seems pretty easy to me. To each his own. What works best for each of us is fine. Thanks for posting.