I would take off that top layer of mold if you can, without disturbing the seeds, then put a light layer of finely ground sphagnum moss on top or a sprinkling of the lightest Seed Starting Mix you can find.
What did you use for a seed starting medium in the first place? My guess is that you used a mix that is too heavy and holds too much water, resulting in the mold forming. Also - were your starting pots/flats perfectly CLEAN? As in, did you rinse them all in a water and light bleach solution before you used them, or did ya just grab them out of the stack and plant away? With your uber-moist growing conditions, cleanliness IS next to godliness! ;)
If you need to start over, clean pots and Seed Starting Mix is what’s needed - it’s light and already has the sphagnum as an ingredient which helps fight the moldies. ;)
I used my clean potting mix from inside my greenhouse (fairly dry) with some. 3-4-4 garden tone.
I washed all my pots in the dishwasher on high temp dry or in sink with bleach water.
I will do as you suggest.
It will not be possible to take the top layers off. I am going to use a mini propane torch to burn the growth then getnmy electrical arranged so I can run the heater, dehumidifier, and a small fan all at the same time.