The more air you have flowing into the incubator from outside, the harder time you are going to have keeping your humidity up. You want less holes not more IMO.
My humidity is the same as yours, though I am using a much better bator in my opinion. Even still, I have half of my holes in the dome of my incubator covered to prevent inflow of air. I am using Lyon incubators, three dome ones (TX-6 and TX-7) and a Roll-X holds more eggs than the styrafoam ones. On my domes, I have to be sure to cover the plug in on the dome where the turner plugs in as air from outside will flow in through the socket and reduce my humidity.
The problem being with yours in that you are using a styrafoam, and while some people say they are great, all of my experiences were seriously bad. They take way too long to regain temp and humidity once you open that lid to add water. Try to prevent opening the bator for any reason. If it was me, I would plug the holes and if you feel the eggs still need air, open the lid quickly once a day to let fresh air in, then close it right up.
My humidity is the same as yours, though I am using a much better bator in my opinion. Even still, I have half of my holes in the dome of my incubator covered to prevent inflow of air. I am using Lyon incubators, three dome ones (TX-6 and TX-7) and a Roll-X holds more eggs than the styrafoam ones. On my domes, I have to be sure to cover the plug in on the dome where the turner plugs in as air from outside will flow in through the socket and reduce my humidity.
The problem being with yours in that you are using a styrafoam, and while some people say they are great, all of my experiences were seriously bad. They take way too long to regain temp and humidity once you open that lid to add water. Try to prevent opening the bator for any reason. If it was me, I would plug the holes and if you feel the eggs still need air, open the lid quickly once a day to let fresh air in, then close it right up.
