ORIGINAL: ronpip
Wax your arrows and take a Q-tip and rub it inside the biscuit on the ends of the bristles. There two things together should make any arrow quiet.
I recomend against this. You need to think what wax does, it sticks to things right? There for youll get so much grime and crap in your wb and on your arrows youll lose valuable performance. I tried waxing my arrows wiht the first WBI had and hadflight issues.