When I last checked my homemade incubator the air temp was 100.4 and my homemade water wiggler says 100.8. It had been running too hot all night so I turned it down and it ran for two hours and that is what it was when I left. The real question is what temp do I go by and when is it really too high? Should I make the water wiggler 99.5 or 100 or is that close enough? I don't have eggs coming so no rush. My water heater thermostat is plastic can I drill it like I have seen to help the temps and it is forced air not still air. It is a cabinet with a homemade egg turner. Anything else you need?