Repost - VENTLESS Fireplace Mildew Smell

Had posted this about a year ago but forgot to mention that I have a ventless fireplace so all of the suggestions were about checking the chimney. There is no chimney.

We have a wet mildew type smell coming from our ventless fireplace in our house. I finally got around to drilling a hole in the sheetrock and pushing a camera through. The metal casing of the fireplace is covered in condensation. Think of what happens when cold metal is outside in Louisiana. Some of the wood studs around it look like they may have some beads of condensation as well. Makes sense since the front of the unit is exposed to the a/c of the house, then this metal casing is just sitting in stagnant humid air as this is just a triangular dead space enclosed by the living room, a bedroom, and an outside wall.

I don't see any glaring patches of mold or anything, but the camera I have is cheap and I can only manipulate it so much.

Questions,

Is this condensation typical for these ventless fireplaces?
I'm assuming this is what is causing the smell?
Should I drill other holes to continue to investigate or hire someone like guaranty restoration to come take a look?
Anyone know of fixes?

Please ask for more info and thanks for all of the help.