I have the Little Giant incubator with forced air and turner. I put 1 thermometer on 1 side under the window, and another on the other side, and left side is always cooler. I even switched around the thermometers, and still, left side is cooler. I bought a Radio Shack indoor outdoor thermometer with hygrometer, put that on the left side on top of eggs, with the outside probe on the right side, kinda laying on the bottom next to the turner, and it says the left side is 97.7 and the right side is 101.5! The original 2 thermometers are on the right side on top of eggs, and one reads 98, and the other 100! Could the temperatures still be settling down because the eggs are warming up? I thought the forced air fan was supposed to make the temps consistent! I am thinking about putting the vent plug back on even though the instructions said take it out--there are smaller holes spaced around the incubator so it seems like it should breathe, and maybe this larger hole (1/2 inch diameter) is causing to much temperature variance? That's my only theory so far.