Incubating eggs, one is warmer???

[Szack]

I’ve started incubating 3 Aylesbury duck eggs. I left them in there for 10 days before cooling and spraying once a day. Ive been using a laser thermometer to check the temp of the eggs before turning the incubator back on. I’ve notice that one egg is always around 1 degree C warmer than the other two. I’ve been candling and all are alive and kicking 20 days in. Is there any reason for this increased egg temp in the egg? Is it normal or do I need to expect anything?

 

[casportpony]

What is the shell temp?

 

[Szack]

What is the shell temp?

The shell temp when I take them out of the incubator is 36.8 on 2 and 38.6 on the other. Even when I change the position of the eggs the 3rd egg is always hotter?