Then, using a halved onion, pierce the top at a 45-degree angle with a large barbecue fork and facing the cut side downwards rub it back and forth over the grates to remove built up grime.

Article continues below ADVERTISEMENT It is second nature to use a large two-pronged barbecue fork to flip burgers and steaks, but the culinary expert advised: "If you own one, I'd advise you to ...