I tried this on my recent Hefeweitzen, taking about 10 spoonfuls of foam with grey stuff in it. It did dramatically reduce the boil-over tendency for sure. Can't say it affected the head just yet, but likely not.For those curious about "skimming the hot break",
 
         
                 
				 
 
		
 
 
		
 
 
		
 
 
		 
 
		 
 
		 
 
		 
 
		 
			 
						 
						