First, you will need a big bag, similar to the ones used for throwing away trash. The bag needs to fit the stove rack. Next, you will need a dishwasher soap tablet. If you don't have something, you don't need to purchase it. All you need to do is swap the tablet for your usual laundry detergent.
Next, you will need a container to put the tablet or detergent in. Pour the hot water into the sink, right on top of the tablet, so it can dissolve properly. Certainly, the water should not be too hot, or else there is a chance the bag could get punctured. If the tablet hasn't fully dissolved, you can make it dissolve faster by stirring it with a fork.
You should put in 3 or 4 tablespoons of baking soda into the mixture. This will make a powerful mixture that can remove even the toughest grease. The liquid needs to be put in the bag. It is important to make sure the bag is not too full and does not have any holes.
Now, seal the bag tightly to prevent the liquid from spilling out accidentally. Then, put the bag containing the grill on a level surface. The barbecue needs to stay in the bag for about two hours. If something is very dirty, you should clean it for a longer period.