my first incubator I hatched nothing, it kept adding too much water when I'd refill the humidity control bottle and it would just glug, glug, glug and zero hatches. no I have a no brainer incubator that thought me, in the spring, here in maine, you don't need to add any water unless your house is really dry. the spring rains keep it humid enough. too humid and they will drown when trying to hatch because the air sac will be too high and they will pip too low and drown. some people on here (SCG??) do dry hatches. I add water to my large incubator every 2 days, it's dry at that point and I'm hatching ducklings. as the chicks hatch, the humidity will go up anyway from their breathing, I heard. not sure if it's true because I don't worry about the humidity like I used to.
Feel free to explain this. Recommendations are for 50% humidity till day 14-18 and much more at hatch. I realize the egg is porous but at this point they aren't breathing air like we are, they are in a wet environment.At present it is 33% and holding steady at 99.0. It is early yet so I might try moving this all down to the basement in the morning so the temp can hold more steady. IDK if there is more humidity down there but I can hope. I can't see it as often though so that's a loss.