Well, all I have is just a couple that I recently received. I have them in a separate humidor.

I can say this, the beads in that humidor has picked up alot of aroma from the isoms.

I had the beads in the same humidor with nc for about 5 months and no smell or color change. I only have three isoms and after four days of just the isoms in the same hunidor and same beads the beads changed to a more yellow color and have an awesome smell.

These isom are all 3 to 4 years old.

Rich