Hi It is the 17th day of hatching my Runner Ducks. I understand that I need to stop turning the eggs and raise the humidity on day 25 but I'm very confused about the humidity. What humidity should I have it at on day 25 to 28? And if the humidity drops should I open the incubator to add water or just leave it. I've looked all over the internet and there are many different answers but I'd like a second opinion. Thank You.