The one best thing you can do to keep you keep grill clean is to turn the heat down to low and let the heat burn off most of the leftover food after you cook. This should be done each and every time you use your grill, and it’s best to leave the grill on for at least ten minutes each time. This will make it so much easier to wipe the grill clean before you use it the next time. Of course, stainless steel gas grills will continue to look their best if you use some stainless steel cleaner on the outside surfaces each time you finish using the grill.