Quote Originally Posted by TheSmokingMonkey
After reading this thread, I switched one batch from a plastic container to a glass one. My previous batch had gone stale quickly and I assume it was due to the plastic container (I had always poo-pooed the storage idea before this experience). We'll see if this helps.

Still would like a chemical explanation of anyone can offer one.
Those baggies are never completely air tight [lots of tiny tiny tiny tiny holes]