That is great. I keep my temp as close to 99.5 at the top of the eggs. I just hatched 31 out of 32 eggs on Day 20. Egg 32 had piped but on the pointy end and sadly it expired before hatching.My fan is a pc fan and it is mounted under one of the bigger vent holes (the ones where the plugs go) and is blowing up. I have never checked the temp at various spots in my incubator. Mainly because that means opening it up. I am on day 2 of my second hatch. The temp has been rock steady at 99.5 degrees on top of the eggs according to the LG bulb thermomter.