I have been moving the hatched chicks to the bottom to dry and removing the egg shell since there is alot of moisture left in the shell and the humidity is way up once the first chick hatches. I put a small old creme pitcher (about the size of a shot glass but with a smaller opening/surface area) in the bottom and it sets the humidity level at about 40%, if they are hatching fast and furious, I take the water out altogether. Since I am moving the chicks down as they hatch I'm always opening the door and I'll wipe the condensation off the front window. It is very different from hatching in other bators and like all of them, you tweek it till you get what works best for you. Since the ReptiPro was originally designed to be used with Reptile eggs, it does not have the air exchange we are used to, but it is alot easier to keep the humidity up. I love mine, some people don't, that's why they make so many different incubators. I had a guy come buy 2 doz hatching eggs today and he likes his old still air bator. I don't even want to try that.