It's not really substrateless, you are using a medium but it does not come in direct contact with the eggs.
So it is foolproof, the eggs never dry out and never get too wet.
Over the years I have changed a few things but now I have it to where it's perfect, no condensation until the last week of incubation.
This what I use
7 quarts sterilite lachable tubs
4 cups of vermiculite or perlite
2 cups of water
Light difuser
Incubated at 88.5
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