This has to be the most famous bar b q dish ever ... I went to USA, to North Carolina to find out exactly how to cook these delicious ribs. The secret is to rub well with a dry marinade, then long slow cook, in a moderate heat, brushed with a mop sauce to keep them really moist. You only ever brush a bar b q sauce on the ribs at the end of the cooking, just to glaze. Even then in some parts of America this is frowned upon. They should be cooked, but still slightly chewy in texture.