Guy , start by telling us how wet you made the substrate before you put eggs in? Why perlite and vermiculite? I have never used perlite, but as far as vermiculite, I always wet the vermiculite and then squeeze out any extra water in my fist as hard as I can, so it kind of stays formed, ( do you understand what I mean)?
Then I make indentations in the vermic and lay the eggs in each groove. IF the room I have the incubator is dryish heat, I may add a small amount of water to the valley at the bottom of incubator, IF my room I have the incubator in is damp/ humid ( Like now I have it in my laundry room) then I do not put any extra water in the bottom. I do haowever check the substrate a couple times a week if it seems dryish I put a few drops near but not on the eggs.
Your eggs can cave in if they are too moist too. If you believe the substrate is messed up for any reason, too wet, you may want to start fresh , make up another container of damp subtrate, and carfully place the eggs into it , trying not to turn them or jiggle them around.
Give more info on what they look like and how wet your substrate is right now
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PHEve / Eve