What Causes Poor Hatch Rates? Investigating Incubation Problems

After an abysmal hatch with signs that our incubator isn't heating evenly, I decided to do amateur autopsies to investigate what happened in the shells.
Some eggs showed signs that the temperature was too low, while others showed signs of overly high humidity.
We're experimenting with another small round of eggs to see if we can manually adjust the settings and achieve a better hatch. Wish us luck!