How to fix mold issue in large humidor

[Lorglath]

I have been using nothing but distilled water in they system, and I do tend to take the oasis apart about once every 1-2 months for a thorough cleaning as it seems to start to get mold in about that time frame. I did adjust the setting down until both of my external hygrometers read 60-65%...

As for circulation, I have built in fans for circulating into each shelf... the thread of my build was posted to puff: link

I am afraid some of the spores are now behind the back of the Spanish Cedar in between it and the back wall of the cabinet.... Mold isn't growing on any new sticks... but continues to grow back on specific cigars that are in my quarantined area that I have wiped them off...

Quite honestly... the case isn't even that air tight, I have to fill up the oasis about 1/2 way every 3-4 weeks... not sure what to do...