I have 2 lg incubators. One I use for incubation and the other for lockdown. I know airflow is important during lockdown but I can't get the humidity above 50 when I take both the plugs out. I kept the plugs in, thinking that the little airholes would be enough and had the humidity at 65 but the eggs didn't even pip. I cracked them open and chicks were fully formed and looked normal. Any comments ? Really would like to iron out these problems.