After you’ve finished grilling, the first step to clean your grids is to crank the heat up to full blast. This will help burn up food residue left on the grids so that you only have ash left to brush away. If you don’t turn up the heat, you’re going to end up transferring a lot of grease and grime onto your brush, making it harder to clean and meaning you’ll end up having to replace your grill brush more often.
Once you’ve burned off most of the debris, you can go in with your grill brush to remove the ash from the grids. You want to make sure you get in on all sides, front and back so that you have a clean surface for your next cook. The grill scrapper end on your brush can help get down in between the tines on your grates. If you don’t clean this off, it will transfer onto your next meal, which is very unsanitary.