Last summer I discovered Grill Wipes, a great way to clean and grease your grill at the same time.  This summer, I discovered GrillStone.  While Grill Wipes are great for light cleaning, they don't address hard-core caked-on baked-on gunk.  That's where GrillStone excells. GrillStone cleans faster, easier and better than wire brushes and scouring pads, without clogging, on hot or cold grills.  Better still, they are non-toxic and made from 85% recycled glass!  I found mine at Home Depot, but you can order online (and on sale!) at Kmart.com.