Newspapers can keep your barbecue grill grates clean and ready for action. After grilling, wait for the appliance to cool down slightly. Then, while the grates are still fairly warm, soak newspapers in water, lay the sheets over the warm grates, close the lid, and let sit for about an hour. Remove the newspaper, wiping the grates clean of any residual debris. You can use the same procedure for cleaning your indoor oven racks as well.