@Venom1080 Agreed. OP -- what kind of T is this -- is a sling or an adult that requires extra moisture?
For mine, I rotate the dampened area and just fill mine's water dish normally. Sometimes water dish is on dampened area, sometimes not.
Also, a little mold isn't the end of the world, and small amounts of mold could be dried out or wiped away. Of course, there are millions of spores you will miss. And, are you leaving in boluses or something (aside from friendly damp conditions) that could attract mold? Anyway, I shouldn't worry too much - our world is full of microbial lifeforms. lol
I have only ever had mold issues when there was something in there to feed the mold. I don't think it can exist on coco fiber alone, although I have had mushrooms spring up from seemingly nothing. Never seemed to cause any problem for my t's though. A couple days drying out and they disappear to wherever they came from.