Is embryo stuck to shell?

[TbChiCken]

Hello,
We are currently incubating 4 eggs(all have spider veins) from our own chickens! 3/4 egg's embryos are moving or floating, but the 4th egg's embryo is one side of the shell and not floating around. There is no blood ring, but whenever the egg is turned, it stays in that one spot, the embryo jiggles a little bit. I am turning them manually, 6 times a day, every day. Temp at 100, but the humidity is a little low (40 percent). Is there something I am doing wrong?
Thank you

 

[JacinLarkwell]

If you're turning them the right amount, they shouldn't be sticking to the shell

 

[TbChiCken]

How do I know if they're stuck to the shell? This is my first time. I got all the chicks already hatched in my current flock.

 

[khymdee]

Experienced the exact same thing just now. I wonder if the embryo's still alive. Did yours make it?