Sometime keeps telling me to open it, I'm having a tug of war going on in my head, open it, don't open it.  Another sign I forgot to mention that you probably read about in a previous post was the start of discoloration.  It's not funny, but watch out of all 14  babies due to hatch on separate dates,  momma will probably be successful in hatching her own then I did with the incubator.  If anything, this has taught me what NOT to do when I put the 5 eggs into lock down next week, or out of the ones that are incubating the one that already got a crack/dent in the air sac will be the only survivor when it probably shouldn't have, because it's still alive and well.  The egg that I'm trying to hatch is #10 out of approximately 30 eggs, and that is what I have found, the older eggs that she 1st started laying are smalling then the ones she's sitting on, those look more uniformed and true eggs,  so the ones in the incubator could have the same problem to at lock down.  Once I empty this hatcher, clean it, I'm moving it where I can't bump it and have them rolling.  But what I don't understand is how I could hear it peep Friday morning, and now it's dead!  Well, I can't confirm until I open it.  And honestly, I think I will.  I knew going into this the risk, and the heart break, yes I wanted it badly, but that is life.  I also read last night that they can get stuck against the shell.  Maybe that is what happened to, could be alive and need this assistance, barely hanging on and that is why i haven't heard it or seen it move.  But, I guess we'll see.  I will post one the deed is done.  As Katharina said, or maybe you as well as others.  Natures way of culling the weak.  But it sucks!!