i have a home made cabinet style incubator. in the past i have had several great hatches. this year my styro bator is having 90 percent hatches and my homemade bator has been terrible. temps amd humidity have been rock solid. eggs make it to lockdown, fully formed and moving. then out of 40 eggs two or three hatch. could i have a humidity issuse and they drowning in the shell. right now i have giunea,duck,wild turkey, and chicken eggs in it. 84 all together. i use the brinsea spot check thermometer and a walmart combo for telling humidity. i think the humidity is higher than its reading. anyone have any advice on what to do.