I've got more tubes than I really need. I used to flat a LOT, riding in the DC area. Since I moved to West BF NC 9 months ago I have yet to flat. I swear, it's almost boring. Anyway, I've got maybe 10 brand new Michelin tubes in boxes sitting in the basement. I'm wondering if they are going to dry rot (oxidize?) and, if so, would it help to seal them in heavy-duty plastic bags?