Re: Harsh/burnt taste
Try two sheets of regular foil. One if you're using heavy duty. Hole patterns are based on preference but usually 3 rings of holes. When you light up your coal make sure it's ashed all over and that there is no black on the coal. Plus keep a small gap between the foil and tobacco. Maybe you overpacked the bowl so the tobacco is touching the foil which makes it burnt and the smoke harsh.