I am planning on hatching silkies and thought I would try incubating some eggs I had available first as a test. I decided to build my own incubator and have a lot of questions. 1.dirty eggs I have 1 1/2 dozen eggs that collected quite a bit of poop. Am I wasting my time in trying to hatch them? 2. Temp changes How much temperature change can eggs handle? The light bulb i have doesn't heat the ice chest up very fast, so when I need to turn eggs, things will cool quite a bit. Does the egg hold enough heat that a few minutes will be fine? I have more questions but I will get these out of the way first.