Stryker, I quoted your post because 3 weeks ago I told you I had my worse hatch in 2 years...92%, but I did have several problems that might have affected that hatch--
1. a lot of 10 to 14 day old eggs,
2. power went off for a few hours while I was gone---came on about the time I got there--dropped to a little above 90 degree's
3. I readjusted the electronic thermostat and not thinking went the wrong way and caused the temp to be 104/105 for a few hours.
I re-set the big incubator 3 weeks ago-----288 eggs, My 80yr old Mom candled the eggs for me while I placed them in the trays, she had me to look a 3 eggs during that candling that were not as "formed" as the others and I told her we would add them and give them a chance to hatch----the rest of the eggs we removed were clear-----over 50 clear eggs---alot from one breed/pen---looks like the rooster took a long break and most of the rest came from the 1 rooster with 17 hens I have in another pen(white leghorns). I had 236 at lock down, took them out this morning and all hatched but 3(not sure if it was the 3 eggs in question because I did not mark them)--- so counting those 3 eggs I was around a 99% hatch for fertile eggs. Decent hatch this time!!