I have 6 chicken eggs, lockdown technically starts tomorrow, but I was candling them today and 4 of the eggs the air cell have not changed since when I marked them day14. All embryos are alive and kicking and 2 are right on track. Humidity has been between 30-50% throughout incubation, with it holding at 30% that last 4 days. I've not added any water, just using the natural relative humidity. I think maybe my incubator isn't moving the air around enough and causes higher humidity pockets, so I've moved all the eggs to new positions in hopes of fixing it in the days leading to hatch, anything else I can do? Should I wait until day 19 or 20 to raise humidity for hatch to help the air cells increase properly?