It can take a few days to see the change
I like to weigh my eggs before I start and mark my air cells
Then every 7 days I recheck
That way I can adjust by 2 weeks
Either add more humidity or less
I like my eggs to loose about 14 % weight
So at 2 weeks I should be at 7%
So far the method...
Have you calibrated a hygrometer?
I never go by my incubator readings
I run little giant bators and it has 5 Channels I only run water in one and not full either and get 45-50 % humidity
My air cells are where they should be
Edited to add
You have time to correct them at day 14
Could you take...