What’s the best way to clean porcelainized enamel grill grates?

Porcelainized enamel grates are more prone to scratching and chipping than solid metal grates. To clean a porcelainized grate, preheat the grill to high, then brush the grate with a wire brush. (Many people like to use brass-bristled brushes, which are softer—and thus gentler on porcelainized enamel—than stainless steel bristles.) Oil the grate before grilling.