This happens whether I use lump or briquettes, and I don't know what to do to stop it. I light a chimney, and by the time it's ashed over, the bottom later is all ash/gone. If I don't wait quite that long, the charcoal is on fire and STAYS on fire in my smoker. If I am attempting the minion method (either by layering the hot coals over the unlit OR by creating a cavity in the middle) it ends up lighting them all almost immediately. I just spent 20 minutes taking out coals that were lit and extinguishing them and moving the hot ones all to one side and putting fresh unlit ones on the other side. They aren't all lighting, now, but the temp doesn't want to drop from ~290. There are a few leaks in the smoker than need to be fixed, but I just can't seem to find a sweet spot at all. I am using a Broil King Vertical charcoal smoker. Any advice??