incubating eggs

[LIChickens]

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[KatD]

This is my third incubation.

My thermometer was celebrated with the brooder thermometer and I slid the tube to line up appropriately with the marks on the cardboard.
The humidity was maintained between 55 - 60 % and the paper thermometer read 99.5 At this time my candling skills were looking for a dark area and movement. I didn't recognize blood vessels or air sac. I saw one baby move.
#1 31 eggs: 21 embryos = about 2/3 fertile
21 fertile: 10 Hatched days 22 and 23. One of those had folded feet and died within four days.
11 eggtopsied on day 25. One of those eggs had a live embryo that died in the incubator.
One small embryo was probably the egg I bumped a week prior when returning to the incubator after candling
3 chicks were fully developed and appeared to be too big for their shell
6 had plenty of room but just didn't get out. I didn't know to look for yolk so I don't remember but probably had yolk sac.

#2 We gathered eggs about a week after culling the primary rooster. We set 32 eggs. The temperature spike 100 on day 4, but was adjusted. Although the thermometer had not been adjusted it did not match the brooder thermometer and I could not slide the tube so I compensated that 98 was 99.5 I could not find my incubator manufacturer instructions so I went on line to try to figure out the proper humidity rather than consult my records. I maintained 40 - 50 % humidity and what read 98. There was one drop in humidity to 30% on day 14 that was brought to 60% in one hour.
No eggs hatched. My husband said there were no embryos in any of the eggs. I suspect D'Roo had not been making his rounds as the newly established rooster besides all the mistakes I had made.

#3 We gathered eggs five or six weeks after D'Roo began acting like the man of the house. I consulted my records. Okay the humidity was fine the first time so I attempted to repeat that humidity. I maintained 50% to 60% humidity until day 18 and brought it to 60%. Perfect. I compared the brooder thermometer with the paper thermometer and 98 = 99.5 My candling skills were better in that I can see the blood vessels and movement and I am starting to get how to see the air sac. A proper candling tool may serve me but I am using an LED flash light under the egg on my fist in a dark room.
41 eggs: On day 18 there were 30 possible winners. Of those 21 moved.
I removed the egg turner and increased the water to bring the brooder to 65% and removed one of the ventilation plugs.
Day 24 no chicks. So I candled two and the air sacs did not seem much too small but maybe like week two, instead of week three, if small
I eggtopsied one of those eggs only to discover a live chick with yolk. DARN! Of course, he died in the incubator. I decided my
temperature was low so I adjusted the heat until t he thermometer read 99.5 like it had on the first hatch.
Day 25: 4 eggs pipped. Two hatched eventually and one tried all day and night and by day 26 had begun to hatch but looking a little dry
Day 26: one pip, one new hatching and the one who tried to hatch all day seems to be loosing the fight.

Its not over but I think my incubator is cold. Right?