I try to keep my incubator between 30 and 40% because that is what seems to work best in my basement. My concern is that sometimes the humidity will drop a great deal during the night. Last night the humidity was at 30% and this morning it was 17. I grabbed a mist bottle and misted the eggs and also wet down the 2 sponges. When the humidity drops that low am I doing the right thing or is there something else I should be doing. I can check humidity during the dag and add moisture, but not quite so easy during the night of course.