I ground up a pound of rolling tobacco about two years ago. I recently tried it again after not bothering with it for a while. It’s great, though I have to be careful with it because it is quite strong in nicotine. Thing is, I didn’t remember it being this nice when I made it, hence the fact that I forgot about it for a while. I just ground some new tobacco of the same brand to compare the two, and sure enough, it has exactly the same young, ‘grassy’ taste to it that I found unpleasant the first time around. The old stuff is really nice, it smells and tastes like a commercial snuff (albeit with no flavoring). I presume that it must be mostly burley, and I thought burley didn’t change much with age. It can’t be fermentation, because the snuff is absolutely bone dry. I dried it to grind it, and didn’t rehydrate it. It was stored in an airtight mason jar. The lid of the mason jar had not popped inwards, so I doubt much oxidation occurred. I struggled to make something nice out of this stuff for a while before I assumed it was just poor quality tobacco and gave up on it. What happened here, and (more importantly) how can I accelerate the process?