Are they all getting mold or just a few?
What substrate do you have them in and what are your temps and humidity?
I've successfully hatched a couple eggs actually that grew some slight mold on them. They were so far along and I had the extra space in my incubator I decided why not try and see what happened.
That being said, I've also had moldy eggs that clearly went bad and the development ceased.
I'd separate any that have mold on them so they dont spread to other eggs.
-Brandon