For the life of me, I can't find a happy medium on regulating the humidity in my new HovaBator...forced air with the electronic thermostat. I am impressed with its consistent 99.5^-100^ temperature. However,
the vast majority of eggs do not hatch, about 20% hatch rate. When the eggs go beyond the hatch date, I break open the egg and find fully developed chicks, some with yolks absorbed and some with yolks still attached. The incubator instructions state that the one water trough should be filled with water, then both troughs on day 18. It also says to leave the vent plugs in the vent holes unless there is condensation on the picture window in the top of the incubator. I realize that every incubator is different but I'm in desperate need of advice from someone who has one of these models and has fine-tuned this particular incubator