I'm lazy. I just take the old jar, use a dry paper towel to wipe out the tobacco dust, and put in a blend of the same type. I.E. If it had a vaper, it gets a vaper. If it had an english, it gets an english. I figure if I expected whatever residue in there to go long term with one tobacco on top of it, why wouldn't it go just as long with a different blend on top of it.
If the jar were 20 years old I might just toss it, but jars that have only had a blend in them for a little while, meh, I just pile the new blend on top of the dust after a quick DRY wipe.
If the jar were 20 years old I might just toss it, but jars that have only had a blend in them for a little while, meh, I just pile the new blend on top of the dust after a quick DRY wipe.