I just twang the string a couple of times like a guitar string before I shoot if the puffs are wet, cause your going to have the same basic problem with beaver balls or wool and that just leaves rubber. Mike at Dryad has some kind of synthetic rope that he cuts a piece off of and frays it out and puts in the string and I bet it doesn't hold water like that, but don't what kind of rope it was. Seen this subject the other day and somebody said something about dynema rope I think which may be what Mike uses. I bet if you emailed him, he would answer. I think he's on the road though right now so might take a couple of days to get an answer.