Cleaning Gas Stove Burner

Use a low grade sand paper.

Have you tried making a paste of baking soda and water? Use it like you would cleanser. Also, you might want to try a credit card as a scraper if the burn is thick like burned on food. But as jeff Campbell from the Clean Team warns, always use a plastic scraper with liquid like water to prevent scratching. The water works as a lubricant.

Good luck