I always cover the outside of the pan with foil for cleanup. Inevitably something gets past the foil and into the bottom of the pan, through a pinhole in the foil, I guess. So I'm washing the pan in the kitchen sink after every use. Foiling the outside means no smoky build-up on the bottom. But there's no right or wrong answer, do what makes sense to you as you get more experience under your belt.I didn't see the sense in that either. Thank you so much for your input.