Hi, I am hoping with to incubate chicken eggs soon. I incubated recently for the first time, but none hatched. I just heard that you have to leave your eggs at room temperature for 12 hours before placing them in the incubator. Is this true, or can I just put them straight in the incubator? I didn't leave them for 12 hours last time, was that the reason most of them didn't develop? Thank you.