Me again.
Many things can affect a hatch. The health of the eggs, genetics and position of the chick.
Humidity and even the thermometer used.
This is why I offer the article. It helped me to tweak my system and I learned a few things I was doing wrong. Not the least of which was placement...
I suggest you wait another day or two. Also if you will send me your e-mail I will send you a copy of an Article from Practical Poultry magazine that helped me.
My first few hatches were a disaster. It might help.
Rancher