Okay, now that I've been smoking going on a few years, I keep noticing something. If I open a tin, and leave the baccy in there, say, 6 months to a year, the flavor of the toby seems to dissipate the longer it's in there. I've noticed with certain tins (like those of C&D and GL Pease--the lined, coffee can type), the freshness of the toby lasts much longer. But with other toby tins (especially a square tin, say, like FVF, or, a round, flat tin, like, Balkan Sasieni), the longer it's in there, the worse off the toby gets. So, my question is, how long after you open a tin, do you jar?