that thread is a hot mess. We are several newbies at incubation, with a newly designed bator. People are having issues with temp spikes. The 9300 has a weired temp/humidity sensor that moves around alot. I plan to install a computer fan next hatch and see if it helps. It would be great if a hatching guru would stop by and help us out. But anyways; congrats on getting a bator and good luck with the ducks.
Make sure the fan blows air into the incubator.