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My incubator was about 99.8-100.2  Got lucky with that one. They can be tricky to configure. I started the humidity at 40% and then let it dry down to about 25. Many times I would wake up to 21. I would syringe a little water in there (never on the eggs) and wait about an hour. It usually ran about 40. Sometimes as high as 56. I would always let it dry back down low before adding more water. I always left the red plug out for good oxygen levels.
  It was too difficult to keep the room humidity about 50% because it runs dry out here. Average 30% in room.
On day 18 I went on lockdown and changed to the hatcher (about 100.8) I used sponges in there and would put more water as needed through tubing inserted into the vent. I kept it at 83 for most of the time. I had Marans in there and they have such hard shells.
  I also turned the red plug upside down and covered most of the vent hole with it so the humidity didn't go haywire. 
If I could change one thing it would be to have seperate hatchers for each egg breed. The ones needing higher humidity like Marans and those with thinner shells who don't need as much.
  I had to help a few out, and did have one sticky chick although it was only stuck a tiny bit to its thigh (It still couldn't zip right like that)
But 9 out of 10 BLRW pipped so that is a thumbs up for dry hatching and the chicks not "drowning"  9 out of 12 Marans too. And the 2 Javas. I only lost 3 eggs out of 24.
Not sure if one of the Marans will make it. It is small and weak. But it pipped!
Hope this helps.  Oh I forgot to say it is circulated. A genesis
rustyswoman, I'm sorry but all that flies in the face of all know wisdom; it will NEVER produce good results of any kind.  
Oh, wait! Uh...
Never mind!