I'm attempting to rehydrate some ISOMs I brought back from Germany, they are a bit dry. I've placed them in a Tupperwear container with a sponge (in an open plastic bag) that is 'damp' (not soaked), and every few days rotate the sticks about a 1/4 turn, plus add drop(s) of water if the sponge is dry...A good sign is that the sponge is drying out. This takes about 30 days. By the way, I'm following advice I read from a book on Cigars. But these guys on this board are very smart on this kind of stuff, you may just want to put them in your humidor, and perform a squeeze test on them every now and then.
Good Luck-Joel