well said Margie. Sorry for your loss Josh.
x3
I tossed the last 8 eggs. There were no internal pips or signs of life. They weren't shrink wrapped and the air cells were a good size. Since they all made it to the hatching stage the only reason I can find that isn't related to humidity is poor ventilation.
I made some modifications to the incubator. I drilled 2 more ventilation holes in the top, added a new fan that pulls air from the top and bottom, added a large piece of flagstone and more rocks to the bottom to act as heat sinks, disinfected the whole thing (including the rocks), and sealed up the edges of the hole in the top. The lid of the cooler is hollow inside so when I cut a hole for the window the inside of the lid was open, I think a lot of the humidity and heat got lost through this and that's why it was hard to get things to stabilize.
If I ever do eggs after this next batch, I'll add some heat reflectors to the lights to lessen any chances of hot/cold spots.
The 8 chicks that hatched are doing well. The splash silkie has the coolest pattern. We are keeping it if it's a girl. The BO or RIR looks neat too, a buff chipmunk. The BCM is blue, fluffy, and super soft. They are eating (I crushed the food to an almost powder) and I'm dipping their beaks to make them drink.