Boy I tell ya, I don't understand this at all. There is a problem with SMOKE from a wood/charcoal fire burning?? Or even from a little left over grease or fat? The only smoke issue I can think of is burning knots or hard wood and letting it smolder too much. Especially with Mesquite knots on long cooks for ribs or brisket. I'm a seasoned veteran on cooking with fire/wood/charcoal and I am just puzzled about this.