I use foil as I cover the flame zones anyway and Reynolds HD from Costco which is the perfect width. I did a long smoke of pulled pork without it and it took 1/2 an hour to clean up. Not anymore. Just vacuumed for the first time after 6 month. Oh my. After 6 or 7 bags it was full of super light ash in there. Used a plastic tube and shop vac adapter to really get in and clean it. Still took me longer to drag the vac 20 feet than to clean. I can’t say enough about the design of how the parts come out without wrangling or knuckle scraping. Thank you. Thank you. Thank you. The Traeger Jr. was a real PITA so I always left it to my husband