Get the timing right first

This is the single change that makes the most difference, and almost everyone gets it wrong in the same direction.

The common advice is to brush the grate while it is screaming hot. It feels productive, because the residue chars and flakes. What it actually does is soften the wire on your brush so it bends rather than cuts, and it bakes grease into carbon instead of releasing it.

Wait about fifteen minutes after the burners go off. The grate should be warm to a gloved hand, not hot. Warm grease wipes; hot grease smears; cold grease sets.

The five minute routine

Scrape the heavy crust. Take the thick stuff off with a scraper edge before any brush touches it. A brush loaded with crust stops cleaning and starts smearing.
Work along the bars, not across them. This is the other thing nearly everyone gets wrong. Dragging a brush across the grate only touches the crown of each bar. The sides, where most of the residue actually sits, never get touched. Run the brush down the length of each bar instead.
Do the underside. It collects as much as the top. Turn the grate over or reach beneath it.
Wipe it down with a damp cloth. Every bar, every time. This lifts what the brush loosened, and it is the step that catches a stray bristle before your food does.
Oil bare cast iron. A thin film of high smoke point oil while it is still warm, or it will rust before the next cook.

What to use on which grate

Stainless steel bars. Stainless wire is fine here and it is what the material is built for. Nothing to be careful about beyond the timing.

Bare cast iron. Also fine with wire, and cast iron benefits from an aggressive clean because carbon builds fast in the pores. Re-oil afterwards without fail.

Porcelain-coated. Careful. Wire can mark the coating, and once it is chipped the exposed metal underneath rusts. Test a back corner with light pressure first, or use a scraper edge and a nylon tool instead.

Ceramic or enamel. Skip the wire entirely. A scraper edge and a nylon brush are the right tools.

Cleaning grill grates without a wire brush

If wire near food is a line you would rather not cross, these work:

Bristle-free coil brushes. Tight steel coils with no loose strands to shed. Decent on a warm grate, slower on baked-on carbon.
Pumice blocks. Genuinely effective on heavy build-up and cheap. They wear down fast and make a mess.
Wooden scrapers. They cut their own grooves to match your bars. Good for maintenance, poor on anything that has been left a few weeks.
Grill wipes. Convenient, disposable, and best treated as a finishing tool rather than the main event.
Onion or foil. Half an onion on a warm grate, or a crumpled foil ball held in tongs. Both work better than they sound and cost nothing.

All of them are slower than wire on baked-on carbon. That trade is real and worth knowing about before you buy one, because a tool that cleans badly is a tool you stop using, and a grate you stop cleaning is the actual problem.

If you do use a wire brush, check it

13.4 million wire bristle grill brushes were recalled in 2026 because bristles were detaching without anyone noticing. That is worth reading about if you own one — we have written up the affected models and what to do.

Whatever brush you own, the check is the same. Look for wire that is splayed, kinked, discoloured from heat, or missing strands. Any of those and the brush is done. Compare the middle of the head against the edges, where loss shows first.

On most brushes you can only inspect the outside of the wire, because the bristles are moulded into a sealed head. Ours comes off with a wrench so you can look at all of it, which is the reason the head detaches at all.

How the brush works