Aluminum Foil
After the last steak is brought in, but while the coals are still red-hot, lay a sheet of aluminum foil over the grill to burn off any remaining foodstuffs. The next time you use your barbecue, crumple up the foil and use it to easily scrub off the burned food before you start cooking.
Baking Soda
Keep your barbecue grill in top condition by making a soft paste of 1/4 cup baking soda and 1/4 cup water. Apply the paste with a wire brush and let dry for 15 minutes. Then wipe it down with a dry cloth and place the grill over the hot coals for at least 15 minutes to burn off any residue before placing any food on top.
Garbage Bags
That neighbourhood barbecue was a blast, but your grill is a sorry mess now. Take the racks off and place them in a garbage bag. Spray oven cleaner on the grill and close up the bag. The next day, open the bag, making sure to keep your face away from the fumes. All that burned-on gunk should wipe right off.
WD-40
To make a worn old barbecue grill look like new again, spray it liberally with WD-40, wait a few seconds and then scrub with a wire brush. Remember to use WD-40 only on a grill that is not in use and has cooled off.