I also use the Little Giant with turner, except mine is still air. I've noticed that mine does the same thing on occasion. I really don't have a solution for it. I always panic if I see it that high, and I will immediately crack the bator open for a minute. That usually stabilizes it, however, you couldn't do that during lockdown. Mine has never done it during lockdown. Are you also using another thermometer? I would highly recommend you do, if not. I talked to the manufacturer, and their advice was to never go by the readings on the bator, especially for humidity......Go figure....Question about incubators. I have a little Giant that has a fan in it and I just bought an egg turner for it. I have noticed that the temperature inside normally is where I set it at, at 99.5--100.5 for chicken eggs. I notice that the temperature will rise to 102.5 or so at times and then drop back down with in a half hour or so. I believe it is due to the egg turner. That little motor gets hot. My question is this, is this temperature increase going to kill my chickens? I have not had any issues with it when setting quail eggs but it seems like those are easier to hatch. I just thought maybe I should just get a temperature controller? Thoughts??