[pektel]

I just use a chunk of bread. Stole that idea from the cookie jar (adding a slice of bread to the cookie jar keeps the cookies from drying out).

It's worked every time for me. Though I use about 1/4 slice at a time with pipe tobacco. If the first one doesn't rehydrate it enough, I'll remove the dry piece and add a fresh one.

But I'm never in a hurry, and this can take a week or so if the tobacco is really dry.