When you are preparing your grill for direct cooking it is preferable to wipe the grill with oil to prevent food from sticking . I used to use a paper towel soaked in vegetable oil for this, but I have found a more convenient way. I now buy Original disposable grill wipes by Grate Chef (www.gratechef.com). I have found them at Home Depot in the US and Canadian Tire in Canada. Just place one cloth on your grill brush and wipe away. I reuse them several times and keep them in the resealable package. For about 3 dollars for 6 you can’t go wrong.