So I put two deliciously marbled prime steaks on the bbq tonight. After turning them, I went into the house for less than five minutes, which was enough time for smoke to start pouring out of the vents. By then the flames were too big for me to open the lid, so I stood helplessly by as my steaks charred. (We ate hot dogs.) How do I avoid this in future, or, fix it if it does happen again?