Rehydrate old tobaccos by boiling a pot of water and then placing a strainer filled with the dried out tobacco above the boiling water. The steam penetrates the tobacco. After about a minute, spread the tobacco evenly onto paper towels. If the tobacco is too moist, leave it out to dry a bit until it is “goldilocks.” Transfer the tobacco to a sealed container. This works as well as my method: putting a shot glass filled with water, carefully, without spilling it, into a clear sealed container with the tobacco. Then put the jar in the sun for a couple of hours…..