Several of us drive our LX2610. I hit the glow plugs for a few seconds at just above freezing when starting, as stipulated in the manual.  One of us says the dealer said to heat them for up to a minute. A few seconds works for me, and a minute seems too long. Can the glow plugs be damaged if heated for too long? Seems like we have conflicting instructions. Any advice would be helpful. Thanks.
	
		
			
		
		
	
								 
				 
				
		 
 
		 
 
		 
 
		 
 
		 
 
		