I did email Joe F. and he replied (at 8am on Christmas morning! Thanks Joe). His response was similar and he said that you could seal it up and keep it at room temp, in the fridge or freezer with no issues. He did say that it should not get wet. I feel like my bag here did not get wet but there WERE some small hardened clumps in the bag. I started using it in June of 2016 so this stuff is 18 months old... far less than the 5 year shelf life. Anyway, I took the one unopened package I have and put it into three small plastic bottles with tight-fitting lids so I could store it better. Cheers peeps.