What do some of you use to clean this rear end cover?  Because I drive about 1200 miles annually, it has really become dirty.  I know that I can remove and sand blast it, but, is there a simpler way to clean it without removing it?  All comments welcome, thanks.
	
		
			
		
		
	
				
			 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		