Still air. Temps have been a constant 99-101 about a week in it did drop a couple times to about 80 but since then no issues. Yes I've candled and right before lock down I did again and was barely able to see movement and marked the air cells which seemed average from pictures I've looked at online. I removed 2 infertile eggs and one that sadly stopped developing.
So the temp was probably low, since for still air you really want it to be 101.5 measured at the top of the eggs. With a low temperature and especially with a time that the temperature dipped down into the 80's, the hatch is now late. Also, are these temps coming from a built in display on the incubator, or are you using a thermometer that you've calibrated and know to be accurate?
The eggs were from my own flock in the yard. We had a rooster then but he was dispatched about 2 weeks ago.
Only way I can get humidity up higher is by putting my small diffuser/humidifier in there and I can get it up to 85. Isnt that too high though?
85% is high. For lockdown 65% will suffice, no need to be higher than that.