Outdoor grills take a lot of wear and tear from weather, pets and grilling. When you’re not using your grill, cover it with a grill cover. Covering your grill will help reduce corrosion and rust so that you can increase the overall lifespan of your grill. When choosing a grill cover, measure the height from the tallest point and the width from the widest point on the grill. Buy a grill cover that is at least one to two inches larger than the dimensions of your grill.