That's basically all the info I could find on another board.

Place the litter in a container ( 1 pound per 5 cubic feet of humidor ) with a small bowl of water and a hygro. When the rh reaches the desired rh%, maintain that for 2 weeks and the crystals are done. I guess they actually retain a memory (?).

When rh begins to drop below 65% it's time to recondition them.

Simple. Cheap. I love it!

PLUS! Thanks again Hugh! Now I'm a member of Cigar WIse!