Did a quick search for 'rust' and found this thread. Wish I would have seen this earlier!.............. I ran mine out of any pellets I had a few months ago, and walked away. Last week I notice the inside of my less than 1 year old Avalon is all rusty! Damn! Last night I gave it a quick cleaning, wire brushed some of the rust off, and gave the inside a light coat of WD-40. I also wrapped the exhaust with an empty pellet bag and will pick up some baking soda today to put inside the stove.