So for those who are just starting off with incubating and have a hovabator incubator I have run my incubator with the one trough filled that the instructions say to fill for the firls 18 days and i get a humidity of approxmitly 50 % and when in lockdown and supposed to fill both troughs i get a reading of between 62 and 68% humidity. When i set eggs i have always followed the instructions and this is the first time i am even going to monitor the humidity. So you may read that the humidity has to be a certian % for the first 18 and then for lockdown a different % but i think it all just depends. From never monitoring the humidity i have had no bad hatchs. i think my lowest hatch rate was 8/10 so still really well. so good luck and happy hatching.