Humidor humidity

I just purchased my first humidor a few of weeks ago from Cheap Humidors. It is a 100 count. I put a large bowl of DW in it for 11 days with the humidity reading 85% when I took the water out. I then put my uncharged 65% Heartfelt beads in it to help stabilize the humidity before putting in my small stock of cigars. It has been sitting like this for 4 days and has been reading 75% for the last three days. Why can't I get the humidity down to the mid 60%.
certexas