Hi,
I think it's too wet - especially since they are buried in it.
The best way is to mix it by weight - 100g of water for every 100g of vermiculite.
No water coming out when squeezed is half the test - it needs to hold the shape but come apart really easily when you rub it with your thumb or fingers.
You might want to try substrateless if you can get some light grating to sit the eggs on to support them above the vermiculite.
dr del
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