Advantages to "burning off" grill My father insists on "burning off" the grill by letting it run on high after each use. Is there any advantage to doing so?
The idea is to clean the cooking surface.  I typically fire up the grill, then, just before placing product on, use a wire brush to clean the grill surface.  No reason that you couldn't do this at the end of a cook, preparing for the next cook.  The advantage to cooking on a clean surface is that there is reduced chance of food sticking to the grill.