My clutches hatch really quickly...

Psshhh, my one clutch is going on three weeks and no baby snails in the eggs. The others are aging and still nothing. And they're at least 80F with high humidity. :(
 
Psshhh, my one clutch is going on three weeks and no baby snails in the eggs. The others are aging and still nothing. And they're at least 80F with high humidity. :(
Could they be infertile? Are these P. diffusa? The shortest time frame I ever had is 8 days but 3 days seemed so unusual to me as well.
 
Yeah, the diffusa/bridgesii. Those are the eggs I'm always asking about. Most people seem to have them hatch in approximately 8-10 days, but everyone tells me to wait until three weeks, sometimes up to five weeks. They're on the one light that never gets turned off. I've broken eggs open and there's just goop, no immature snails or anything. With all of the humping that goes on in that tank, I certainly hope that 4/4 clutches weren't infertile.
 
Well, to be honest, I never leave my lights on all the time, just 8-10 hours. 12 hours at most. It could be possible the egg yolk got evaporated from too much light. I have noticed this on some eggs of the canas closest to the light source. When you smash some eggs, there is no snail nor goo at all.
 
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