I have 12 eggs in my incubator but my incubator has like a strong moldy smell to it, but see no mold. Why is this? I checked the eggs and they smell like the incubator.. However I've been have 2 chicks hatch a day lately. Could it just have been that the water started getting icky? (I changed it out and washed it a little, though QUICKLY) why is it like this though?