So I recently bought a grill and it's a gas assisted charcoal. Came with two separate trays for the direct/ indirect heating. So I've been filling up one side and using it. I'm getting grill marks but not the blackened goodness I want. As far as coals I've waited until everyone of them has completely ashed over but then I thought by the time I was cooking the bottom layer was dying down. Should I not wait until they're completely ashed? Sorry totally n00b at grilling trying to git gud.