Man, some days ago i did make hash oil from weed that was some 6 months old. It was stored in my cupboard, just wrapped with some plastic, but definitively NOT airthght. It was very dry and crunchy, but without any mold (here is very hot). Its potency is somewhat lower, but still makes me very stoned, and it became creeper. I think the only reason it became creeper it the old age, because it wasnt when it was fresh. Anyway, old, creeper, yet it makes me high, and thats what matters! :stoned::rastasmoke::thumbsup: