Enjoy it! If the oils are still around, then you should have some decent results rehydrating it. Don't hit it directly with moisture though.
Put it in a bowl and drape a distilled water soaked washcloth (rung out as to not be dripping wet) over the top. Check the tobacco and rewet the cloth a few times throughout the day. After a few days you should be back in business! This is the only method that has ever worked for me in bringing back aged compromised tins, as long as the oils are still present.