I built a incubator this weekend and had the temp stabilized around 99, so I put a egg from the coop in there to see what happens in a few weeks. Today I get home for lunch and the temp is 108 and the little fan has quit in the incubator. I guess the lack of air circulation cause the temp to spike? I have one 40w bulb on full time and one 25w bulb controlled by a water heater thermostat. I know it was stabe all night so I guess it was due to the fan cutting out. Anyways I had another fan and put it in real quick. I'm inclined to see if the egg still hatches, is it pointless? The thermometer is close to where the egg was but maybe the egg was a little cooler? Anyways, looking forward to getting the 'bater dialed in and hopefully some chicks in the coming weeks.