It seems that even good quality lump has some amount of very small shards of charcoal. By the time I go through 4 to 5 bags, the bottom of my lump storage bin has about 6" of that very small material. It makes me nervous using it since it packs in so tightly it must impact airflow. Do you use it anyway, toss it, or...?
LBGE & SBGE. Central Texas.