I am trying to hatch chicks from a still air incubator, I've been turning the eggs once a day for eighteen days, the temperature has stayed around 99 & 101. Day 21 came and nothing happened. Here I am at day 40 & still nothing. I know there's something in them because I candled them and there's a black mass inside. I'm very anxious to know if they are going to hatch but also scared I did something. With this in mind this is my very first time trying to hatch eggs on my own. Are they just to weak to hatch? Or is it something I did?