Man she was dirty. It's the first time I have ever cleaned my grates before. Took the hose to them and everything. I used it tonight when the parents came over and what a difference on how my machine ran. Got up to temp fast and held steady. My ash box was pretty full. I even took my stack cover off and cleaned down there as well. Like new again. BTW that Treager all natural cleaner works wonder and it naturally safe.