I agree with Mike. I think a lot of hatching problems stem from flock maintenance, not the incubators. As far as the incubators and hatchers go, I start with a thorough cleaning with Tek-Trol disinfectant solution. I usually run the incubators and hatchers for a couple of days to check for constant temperature and humidity and see that the egg turners are operating properly. If not, its maintenance time for heat elements, thermostats, motors etc. I try to have spare parts on stock at all times. Nothing worse than having a part go
out 2 weeks into a hatch cycle. With the Hatcher available I can transfer eggs and keep them warm while I make repairs and get back in business.