How to clean rusty grill grates effectively?

To clean rusty grill grates effectively, start by scrubbing them with a wire brush to remove loose rust and debris. Then, soak the grates in a mixture of equal parts vinegar and water for a few hours. After soaking, scrub the grates again with the wire brush and rinse them thoroughly. Finally, dry the grates completely and apply a thin layer of cooking oil to prevent future rusting.