Heartfelt beads help please

I picked up some heartfelt bead tubes for my humidor and I cant seem to get them to keep the humidity up. According the the heartfelt website, I am using about 3 times the required amount of beads (65% RH) and my humidor is still not holding it's humidity. I looked at the beads and a majority of them are clear, so i know the water is there. I never really had a problem holding humidity level in this before the beads, and they seemed to have worked for a little while, and now it just keeps falling off a little every day. Any suggestions?