This year I am controlling the humidity better. I'm keeping it in the 20s and 30s for the most part, and then raising it to 65 for lockdown. Last year I was incubating in my garage, and we had some humid weather, and even without adding any water, the humidity was way too high. Most of those chicks drowned in goop when they started zipping. For me, keeping the humidity very low until lockdown has resulted in excellent hatch rates this year.