Hmm...stumped me, too.
This past weekend, I was cleaning out the garage, and DH & I found a really old ashtray that had both ashes and bits of old, unsmoked tobacco. I decided to take a good whiff just to reinforce how nasty the habit was and particularly how it smelled.
Well, I brought the ashtray up close and, lo and behold, it was moving. Little itty-bitty bugs were all through it!!! Not ants. These things were about the size of the tip of a pen and mainly in the unsmoked bits of tobacco.
I'd be wary of smoking old cigs if I were you.
Good for you for cutting back. Replace those stale smokes with a coffee straw or piece of gum