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As a newbie I pull all the spent coal out of the firebox before loading up for each new cook. The last cook was pork and beef ribs together (yum!) which left me with a quart or so of round, smallish bits say 1" in diameter.
Do you chuck them? Reserve them for a certain type cook? Friday I'm cooking 2 8lb pork butts plus 4 lbs boneless chuck beef rib roasts (lots of meat) and don't know whether to toss the small bits in or if it will increase chances I'll choke off the air holes in the FB.