Deg Sand

What's wrong with my leopard gecko eggs?

OK, I purchased 2 Leo Geckos about 2 years ago. I found out later that one was a male and the other female. Last year, the female layed two eggs in the substrate. With in an hour or so, they appeared as if they we "deflating". the side started to cave in, or appear dented. We discarded them, as we were not prepared to raise babies.
Just recently she laid 2 more eggs in the substrate. This time we had a tupperware container with some sand and damp moss to place the eggs in. I have a thermostat and a hygrometer in it as well. the temp is maintained at 81 degrees. We marked the top of the eggs so as not to drown the embryos. My quest.: Within two hours, the eggs again appear to have the "deflated or dented" appearance. Is this normal? or what have I done wrong? The temp remains constant at 81 deg. and the humidity is 99 degrees. Is it too humid? I could not find Vermiculite, could the moss cause the eggs to die, or are they just not fertile. Please help!!

99% humidity is wayyyyyy to high. They need to be 60-80% humidity.

It sounds to me like they aren't fertile. She should continue laying two eggs every two weeks until September or so.

You can use perlite or peat moss.

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