I have a desktop humidor that was hand made by my brother. I have had it 3 years now and after a few different humidification options have settled with the bead recommended on this forum. My box holds between 75-100 stick. I have the round 3" dish with 65% beads. With a approximate monthly dose of distilled water I have been rock solid at 65% for a year. Now I seem to fill the dish once a week and after a few days the box is dropping to 63-62%. Do I need to replace the beads after a year or so?? Could it be something else? I am in LA where there isn't a huge difference in season so I wouldn't think it had to do with weather. Any suggestions?