Quote Originally Posted by Eville View Post
How can you not be sure when to refill the beads? If your humidity is dropping and the beads are white, add water. If your humidity is too high and the beads are dry, let them air out a bit. If your humidity is where you want it, keep the beads in that condition. It really isn't that difficult. Sorry if I sound like an ass, but it isn't a difficult concept to implement once you have been given directions.
Humidity can drop because of a poor seal, seasonal changes, additions or subtractions to the contents of the humidor.

Simply stating that its time to refill your beads when your humidity drops is idealistic and will probably work a percentage of the time but realistically, there is no clear way to measure when they are actually depleted. This is a real downside to beads.