I have to give credit to Sunshine Silkies, she told me to run 40-50% for the first 18 days and then increase up to 73% percent.  I hatch Silkies and I am having really good luck hatching them at these humidity levels.  I have 4 hatched so far out of 6 in the hatcher and other 2 are on their way out.
	
		
			
		
		
	
				
			
	
	