A wise man once told me;
I use nano-silver mixed with my distilled water, and this eliminates any possibility of contracting mold, and keeps the spores from spreading if there is mold introduced to the environment. It is odorless and tasteless, as well as non-toxic...
This will work, 2 ounces per gallon of distilled water (20 ppm Ag). I use it with my aristocrats and my set it and forget it systems, as well as my beads. If I see any mold on recently purchased cigars, I used the same solution to gently wipe down the cigar, it kills any trace of mold...
http://www.amazon.com/Nano-Silver-Colloidal-Ounces-Market/dp/B00DQIEDWY