Air cell growing to fast, but humidity is already high?

[TheChicken-nator]

I have 8 duck eggs in the incubator,.over the last two days they have grown an enormous amount but my humidity is at 55-60% all the time. They are 20 days and due for the 6th. I don't know why this is happening and this is my first time incubating duck eggs, but I have done chicken and this never happened. HELP!!

 

[TheChicken-nator]

When I say they I meant the air cells, sorry I rushed to type this out

 

[Isaac 0]

Sorry, no one was able to answer, how's your hatch going?