Been playing around with humidity beads and have found the 65% to be ideal. I get a nice even burn on my sticks, less cracking of wrappers and no mold. I do advise against climmax beads since the customer service sucks. You can get them from here:

http://www.bargainhumidors.com/bh/category.aspx?categoryID=11&startpage=0

or here

http://www.heartfeltindustries.com/beads_1.html

Have been using both for a while now and have had no problems.