So while I wait for my eggs to hatch, I started thinking about how I plan to add some more fans/airflow to my Farm Innovators 4250 before the next round. Lots of cold spots down in the lower half of the incubator that I want to deal with. I realized that every time I have tried to feel the airflow from the fan in the lid, it is so weak that I can't even tell if it is blowing down on the eggs, or if it is sucking air up from the eggs. Anybody want to weigh in? It may impact where I place my additional fans. My only observation so far is that it does seem to collect a little dust on the lid/behind/above the fan, so that might indicate it is sucking air up from the eggs versus blowing it down onto the eggs.