The Fancy digital read good temps when that little sensor was on the side. It read way to hot when I moved it to the center. The incubator was up to temp before I put the eggs in. It dropped for 2 days after putting them in. Got it back up to 99.8 with the sensor on the side. If it started reading more accurate after placing it in the center was that "day" give or take of to much temp enough to cook them and I need to throw this batch out and start over or wait a few more days and candle.