Spraying and Cooling Duck Hatching Eggs?

[MerryFeather]

I am incubating some of our eggs from our own ducks. This is our first time trying. We 4 eggs going and they were all alive and moving around as of Day 10. Then I started cooling them for about 15 minutes and spraying with water lightly before returning them to the incubator. Today, Day 12, one is dead. It has no movement and veins are mostly gone. Another has fewer veins although it is still moving around. Should I stop cooling and misting them? That is the only thing we have changed. Do any of you that hatch duck eggs have problems with the cooling your eggs or not cooling them?

 

[BirdsBeesTrees]

It's likely that the eggs were going to quit anyway, for a variety of reasons.
I don't see how spraying and cooling would kill them.
It's really up to you if you want to continue doing it.
I'm doing it for the first time with my call duck eggs to see if it makes any difference in them hatching.

 

[MerryFeather]

It's likely that the eggs were going to quit anyway, for a variety of reasons.
I don't see how spraying and cooling would kill them.
It's really up to you if you want to continue doing it.
I'm doing it for the first time with my call duck eggs to see if it makes any difference in them hatching.

Have you hatched duck eggs before without the cooling/spraying routine?