Well, I'm done hatching. I've spent enough $$ in eggs to buy 10 nice birds Up for sale is my almost new hovabator 1583 with an automatic turner. After my first dismal hatch, I enlarged the ventilation holes slightly and added 2 small ones on top. This bator holds the temperature and humidity perfectly...which is why I can't figure out what the problem is. Everything works perfectly, including the turner. I just can't hatch in it for some reason. I did start hatching high quality silkie eggs which may account for some of the problem, but the bottom line is that I'm done hatching...just can't take the heartache of babies that make it to day 18 or so and then die.