help with mold growing on clay pots

[imgliniel]

ok guys, I need some help.

Let me start with explaining what I am trying to emulate. I have one small phal in the bathroom, it is in a clear plastic pot, which I slipped into a clay pot mainly for decorative purposes. I shower in there every night, so obviously the humidity is high. Every time I slip out the plastic pot there are condensation dropplets between it and the clay, so the clay is absorbing water when I shower then releasing it keeping the humidity around the plant high. This is my healthiest plant i have had it over a year, never had any mold or fungal or any other problems.

So recently I got several more phals and wanted to try and emulate the same growing conditions, but I can't fit them all in the bathroom, so I repotted into bark (they were in sphag) put the plastic pot into a clay pot, and instead of the bathroom, put the clay pots in/over humidity trays. The plasic pots do not go to the bottom of the clay ones, so the bottom of the clay is resting in the water slightly, allowing the pot to wick water up and then let it evaporate.

Well I must be getting alot of humidity because yesterday I noticed white/grayish fuzzy mold growing on the outside of the clay pots! It is not in the medium or on the plants that I can tell, just the outside of the clay pots.

Anyone ever had this before? Anyone have any idea how to get rid of it or keep it from developing? Can I put something in the water in the humidy trays that the pot will also absorb? I have heard people mention listerine and cinnamon for mold before. Any idea or advice is appreciated.