Rehydrating Dried Out Pipe Tobacco

I am an occasional pipe smoker, which means that sometimes my tobacco dries out before I use it. Hence this video from a friend:

I had a couple tins of tobacco that were several years old and rather crunchy. One tin was about half full, and after adding 6 to 10 drops of whiskey to it and letting it sit overnight, it was smokeable. It could have been a little moister, so I added a few more today.

The second tin was almost full and 6 to 10 drops wasn't enough to revive it, although I could tell the difference. I added another 10 drops today and will check on it tomorrow.