I find it interesting that Propylene glycol is used to help fight mold.
I guess I am good..my ejuice contains PG
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Propylene Glycol
Propylene glycol has been found effective against mold and termites. It has proven mostly safe for people in low doses, though large concentrations can have negative effects. It is used as a moisturizing agent in lotions and beauty products, and in food and tobacco. Propylene glycol is an "organic compound (a diol alcohol), usually a tasteless, odorless, and colorless clear oily liquid ... ," according to Chemical.net.
Effectiveness Research
In 2007 a product known as Durazol was tested on unseasoned southern pine wood. Propylene glycol is one of the main active ingredients in Durazol. The Durazol-soaked wood completely resisted mold, fungus and termites for eight weeks, while untreated specimens were nearly completely covered by mold and termites. This test was done by the Wood Protection Association in cooperation with the U.S. Forest Service, the U.S. Department of Agriculture and Forest Products Laboratory.
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What is Propylene Glycol?
It sounds a little scary at first, but manufacturers of everything from pharmaceuticals to animal food and hair care products use propylene glycol. Often called "regulating solution" in smoke and cigar shops, this hydroscopic agent is completely safe to use or consume and acts as an antibacterial solution to prevent molding.
The propylene glycol causes the material to absorb excess water when the humidor is too moist. To dampen dry air, the propylene forces water out of the sponge to increase the humidor's humidity level.
Read more: Propylene Glycol for Treatment of Mold & Termites | eHow
Propylene Glycol for Treatment of Mold & Termites | eHow
Propylene Glycol for Treatment of Mold & Termites | eHow
http://www.cigars4dummies.com/cigar-storage/cigar-humidification-systems.html