Hg barbecue, grill and oven cleaner removes quickly and effectively dried and even baked on grease from ovens, grills and barbecues. For best results with hg barbecue, grill & oven cleaner, first warm the surfaces to be cleaned. Spray the surface and allow 3 to 5 minutes for the product to work. Now wipe over the surface with a damp sponge. After the grease has been removed, rinse the oven or grill again with hot water..