GreyGhost, what was your issue and how was it resolved? Might help this case...
All the responces are dead on for checking this and that, great advice, where were you guys when I was going through this.LOL Been using beads since 05 and not really looking on here hard since this year, my bad.
How I got resolved was taking the beads out to dry. Transfered my cigars in that humi to another and then but the dry beads back in and let the humi settle out at 65 rh for 7 days. What it boiled down to was over humifacation and to many beads, also to many wet and not enough to absorb. It is very important to make sure of the dimensions of your humi and the amount of beads. And then how much water to beads ratio. The amount of cigars in your humi is a factor. Since I keep them at least 85% or fuller my temp and humidity are very stable.
This happenened when I switched to beads but now will never look back at anything else.
On my 3 desk tops when I open them about every day depending on what I am smoking the rh drops from 65 to 62/61 till I am done picking one out. Two are glass tops and when I shut them again within minutes they are back to 65 rh. two desk tops are 150 ct. and the 3rd is 300. The 2 cabinets when I open them to basicly restock the desktops or put in boxes and rotate the stock every 3 months they both hold the rh at 65 with very little maintence to the beads. The cabs are 500 and 700 ct.
I do a recalibration on the hygros (digital) every 6 months.