I have read that humidity in the incubator should be at ~ 30% for the first 18 days and then increased to >50% for the last 3 days. My incubator manual suggested > 50% for the duration. The eggs are now into the 20th day and the humidity has always been ~ 55%. Have I killed them? Still 3 days to go. I am pacing the corridor not knowing whether to buy cigars yet.