@Leela NH
Here is my hatch rate from last time (first hatch with IncuView), set temp 100.5°F, dry incubation:
Dominique: 5/6
Swedish Flower: 3/6
Cream Legbar: 1/2
I had a total of 5 eggs that had fully formed chicks in them that never pipped internally. My suspicion is they were shrink-wrapped, although I'm not sure what that looks like exactly. I did a dry incubation, and in the last three days I really struggled to get the humidity up because we were in the middle of a cold snap and my furnace was going 24/7. The eggs that didn't hatch were all the smallest ones, so I think they lost too much moisture.
This time around I'm adding water during incubation to make up for the super-dry air in the house during the winter. I also set the set temp back to 99.5°F since I know temps are a degree or two higher around the perimeter (I was measuring in the middle where the probe is). We'll see if that improves things for me.