I did get one chick to hatch on day 22, he hatched completely in the span of less than 30 minutes (picked the one time I wasn't pacing around the incubator) and had just appeared when I walked back in the room.
The other eggs that were supposed to hatch did not, and after candling them and seeing no movement or internal pips, doing the float test and seeing no movement, listening and hearing no chirping, I put a tiny hole in the shell to see if they were still alive, and all were dead.
All were fully formed, none had pipped internally.
Two were slightly smaller than the one that hatched and had not absorbed the yolk.
One was the same size as the one that hatched and had absorbed almost all of the yolk.
I don't have much experience with hatching, with this only being my 2nd attempt, but none of the eggs looked too wet or too dry inside. The outer membrane was moist and pliable.
Humidity ran between 25 and 35% days 1-17 and I could only get it into the 60's low 70's during lockdown. Temp was steady at 99.
The fan I'm using is a step up from a computer fan, it's a mini desk fan set on low. Could too powerful of a fan hurt them? There's only 3 vent holes in my bator, it's made from a 36 quart cooler. could lack of oxygen be the problem?
Any ideas on what I did wrong, or was it just nature and I just have bad luck? I have some silkie eggs that I really want better results with.