Set up the incubator and run it for a week.
The still air temp muzt be measured at the very top of the eggs and be around 102. It can vary but that should be the average. If it varies a lot then there is a problem with the heater, the thermostat or the room temp.
You need a humidity meter.
Walmart has them for about $6 and mine is accurate. You need a humidity level of around 45 to 50% for 18 days, and 70% thereafter.
Still air incubators do NOT like to be messed with. Keep it closed until you must open it, and open it as little as possible.
Keep it in a stable room. That rules out one potential problem. Candle at 7 and 14 days, then leave it alone.
A water wriggler and digital thermometer will give you a decent idea of INTERNAL egg temp .... it should read 99.5 F.
Basically, if you can keep your fertile eggs at this temp and humidity for 21 days, they will hatch ... so use a process of elimination to work out which parameter is failing.
It's tedius, but it will get you there
hth
Steve
