What day exactly is it? Day 1 is the day after the day you set. If it is after day 15 i would most def Stop turning them. Yes candling them is very tough do you have any pics maybe i can help u identify life. What about is the ambient humidity of the (i assume) home your incubating in? Thatll make a difference with the humidity concerns bumping it or "dry hatching" if u dont know the ambient u can look on a phones weather app and outside is a better starting place than none.
Hello my dear!

! Going well i Just took a pic of my 23 Day old quail check em out!
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Im dumbfounded at the growth rate of the good lines i havent ever had anything sprout like this of the Hundreds of birds ive hatched and raised. I dont have the math but i bet even my pekin ducks didnt match in growth rate per lb + feathers and those things grow at an alarming rate.