there is only a week left for my 5 Rhode island red eggs in the incubator. I have candled since day five and i have seen embryos and veins in at least three eggs. Now it is quite hard to see through the eggs they are very dark is this only because i am only using a small torch ? And should i stop turning them 2 days before they are due of three ? Also humidity what happens if it is low 40% will it be ok ?