I have had a couple late hatches (my only hatches so far), so I thought my thermometer (an acu-rite hygro/thermo combo from Walmart) might be off. So I tried to calibrate with the Vicks Speed Read medical thermometer we have. First, I tried pushing the button, waiting for it to be ready, and then popping it in the incubator really quick. But I kept getting really low readings--like two or three degrees low. So I thought I must be lowering the temp when I opened the bator to put it in. So then I tried putting it in, waiting for the temp to have a chance to stabilize, then pushing the button with a chopstick pushed through the ventilation hole in the bator--so, no opening. But I kept getting weird readings--don't remember if they were high or low, but they made no sense, especially related to the reading on the acurite. And then I realized that it doesn't like to be put in the heat until after it does it's little opening sequence thing. SO, just now I had the brainstorm to stick the thermometer through the vent hole, with the top of the thermometer outside the incubator, and the "bulb" inside, and run it like that. This meant the thermometer's reading would be at the top of the incubator, rather than at egg level, but since I have a circulating fan, I didn't think that would matter too much. It also put the thermometer between the fan & the heating elements. And my reading was sky high! It finally stopped going up somewhere around 102.7! But my acurite is only reading about half a degree higher than it was with my former hatches (in which I had late hatches). So what's going on? Do I need to lower my temp? Unfortunately, the eggs are already in, so I'm hesitating to do anything hasty... but I don't want to screw them up! Help?