Amy Phillips is the hatching expert. She has probably hatched more eggs than anyone else in SC.
This is just my 2 cents worth. I use the dry hatch method. It works best for me. In the winter I have to add water day 1-18 because our heat keeps the humidity at 16%. If it is between 20% and 45% I don't worry about it. I candle anytime from 4 days to 18 days. I always candle at 18 days when I put them in lockdown. I raise the humidity to 65-70%. If I have to, I lay a thick wash cloth folded in the incubator and wet it with warm water to get the humidity high enough. I don't like sponges. I always add warm water when I add water from day 18 on. I also leave the eggs until day 25. I don't worry to much about candling after day 21 until I am ready to toss the eggs because I can not always see movement. Past experience...I have cracked eggs that I did not see movement in and the chick was alive and pipped thru air cell.
I think the reason the dry hatch method works for us here is because most of the year our humidity is high enough for the first 18 days. It probably will also depend on where the incubator is set up. So many things affect incubation. In the summer, my DH will run the AC temp. so low that my incubator will not hold temp. I have to remind him when I am running the incubators.
This is just my 2 cents worth. I use the dry hatch method. It works best for me. In the winter I have to add water day 1-18 because our heat keeps the humidity at 16%. If it is between 20% and 45% I don't worry about it. I candle anytime from 4 days to 18 days. I always candle at 18 days when I put them in lockdown. I raise the humidity to 65-70%. If I have to, I lay a thick wash cloth folded in the incubator and wet it with warm water to get the humidity high enough. I don't like sponges. I always add warm water when I add water from day 18 on. I also leave the eggs until day 25. I don't worry to much about candling after day 21 until I am ready to toss the eggs because I can not always see movement. Past experience...I have cracked eggs that I did not see movement in and the chick was alive and pipped thru air cell.
I think the reason the dry hatch method works for us here is because most of the year our humidity is high enough for the first 18 days. It probably will also depend on where the incubator is set up. So many things affect incubation. In the summer, my DH will run the AC temp. so low that my incubator will not hold temp. I have to remind him when I am running the incubators.