I found the stock string at the time was the main reason my PCH was loud.
SBD sent me one and I added Bowhush n Hush Puppies of course, and was amaized at how quiet it was after the change from the stock string, again...at the time, and the spider silencers. Being that the BowHush weighs hardly nothing, I've never once had it 'untune' a bow...or had a report of one becoming untuned from a customer, and we've been selling BowHush for 14 years now I guess. Plus you don't have to worry about the 'goo' to get off using adhesive pad remedies.
I don't know if BW has changed their strings or not.
Hope you get it worked out....