Just storing the bladder on it's hanger seems to do the trick for my C-backs, especially when they're new. I purchased the hanger separately, and rinse and hang it up to dry after each use.
I think the bladder material needs some time to off-gas, as I've never noticed the "new" odor or taste after the first few uses.
Save your scotch, or at least make sure it goes through the right bladder.
Steve