I've had this stove for 5 years now and I remember asking a question on the pellet forum about being able to see into the burn chamber where the rods go throught the stove frame. Trouble is, I don't remember what  the answer was, or if I even got an answer. It seems to me that this would be an issue for the vacuum in the stove. Anybody out there have an answer on this one?
	
		
			
		
		
	
				
			
	
	![[Hearth.com] Quad Castille heat exchanger cleaning rods. [Hearth.com] Quad Castille heat exchanger cleaning rods.](https://www.hearth.com/talk/data/attachments/92/92080-457433c93cb8f306327a957c1a14062b.jpg?hash=y_4A5jfvYC)
 hotter with the foil!  I'll have to try it again with smaller pieces of foil and measure air temperatures.