I would guess it's condensation from the temperature difference. Give them a chance and see what happens.
I once had a predator disaster take out some very wanted genes, so I took every egg out of my fridge - about 54 or so, some of which were a solid 3 weeks old (I had set a bunch aside for boiling for deviled eggs) and in desperation threw them all in an incubator. I ended up with 38 chicks.
Wooooooooow