I have been having problems with my hatching results and I'm getting really frustrated. I thought I was doing everything right but I can't be. I use a 1588 hovabator. So I have no problems with temp. It stays constantly between 99.5 and 100. I do use a turner. I have been keeping the humidity between 30 and 40%. I have two temp/hygrometers in there and I know they are accurate. I also put them in egg cartons to hatch them in but I make sure there are holes in the bottom for air to get through. I'm not sure what I should be doing with the red vent plug. I have been leaving it out for the first 18 days and then when I raise the humidity to 70% I put the plug in. This last hatch I started out with 18 golden laced cochin bantams (shipped) and 12 Ameracauna frizzles (picked up locally). I candled at day 10 and I pretty much left everything in because I wanted to make sure I gave everything a fair chance. Then when I got to day 18 I candled again and all 12 of the Ameracauna's had developed to the point of hatching and only 7 of the GLC's made it that far. Then hatching day comes and I get 7 of the 12 Ameracauna's and 1 of the 7 GLC's. We opened the eggs up that hadn't hatched and found that they had just died in the shell. They hadn't pipped the internal membrane or anything, they had just died. So I can't figure this out. I thought maybe because I was trying to hatch them in the carton that could have something to do with it but then I don't think so because it looks like they didn't even try. Has anyone dealt with problems like this and actually figured out how to fix it? I'm getting more eggs in hopefully this week that I really want to have a good hatch with so I want to figure out my problem before I set those eggs.