I am coming up on day 10 and would like some advise. I have a lot of duds and about 5 fertile eggs. So if I took out all the duds then the temps in the incubator might fluctuate more. I have a little Giant styrofoam incubator. No fan in it. Should I leave the duds in there to help with the tempture? I am going to take out the couple of blood rings.