So I've been doing lots of experimental batches in 1 gallon jugs and have been using rubber stoppers with airlocks purchased from NB. The new stoppers have a really strong rubbery smell and when I recently bottled one of the batches the smell transferred to the cider. I'm hoping this ages out but how do I get rid of this smell o begin with from the stopper? I've tried running it under hot water hoping that would do something, but nada. Any ideas?