I think what was intended was wondering aloud if there was a secondary device we as people who incubate could get that would warn us in the event our incubators do what yours did and exceed it's setting by enough to be detrimental to the eggs.Wait I know 39.2 is far exceeded, But I set it to 37.5 Most people or breeders set it to that temmpurater.
It wasn't an attempt to accuse you of doing somthing wrong. I too am sorry for your losses. I must have phenominal luck I get excellent service from my cheap chinese no name incubator. I do need a better one though if I ever think I might attempt to incubate the call ducks I'm intrested in. Gonna let a mamma duck hatch my first ones but at some point in future I might want to incubate some or have a mamma quit on the eggs before done or somthing.