I have and even after candling and monitoring temps/humidity and I even give then 3 or four extra days out of desperation, when I break then open some are fully grown and dead and some are mostly smelly liquid rotten. No chicken. But when you candle it it looks like something is in there and has an air sack. Most have these have come from the mail. SO I know there is a lot of factors there. But so far out of 26 eggs I have 3 chics. It is devastating. I have stayed up four nights in a row watching them. I honestly think at times I see slight movement. But when I give up and open them... dead or just rotten liquid. I put 3 humidity and 3 temp monitors in each bator. One moves the eggs and one is for lock down. I am not sure what I could be doing wrong. The ones not fertilized are easy to figure out from candling but the others really can fool you. Help!