I've been using the genesis 1588 with turner this year (instead of my hens) & it seems to be quite good at holding temp and humidity. I've been running the incubation period at about 45-50% humidity & lockdown at 65-75%. My problem is with late quitters - chicks dying right around day 18 which makes me believe it has something to do with humidity. I seldom have chicks die when I hatch them under the hens. I've read that some people run humidity much lower and others much higher so no sure what, if anything I should change. Any suggestions?