I think that fan I mentioned will help a lot. they may have one slower but if you put it pointing up it shouldn't matter. just so you know all incubators have some temperature difference. you are right though, yours is alittle to much.
one thing to remember a hen doesn't have a thermostat, the temp will fluctuate a little. maybe when you turn your eggs, move them from shelf to shelf and see what happens?
one thing to remember a hen doesn't have a thermostat, the temp will fluctuate a little. maybe when you turn your eggs, move them from shelf to shelf and see what happens?