Before you start
Cast iron grates (like the ones you probably have) can be damaged if you use the wrong products on them. Things like metallic scouring pads or steel wool can damage them so you want to use other accessories. Opt for a sponge, a non-scratch nylon scrubber, or a heavy-duty brush combined with a baking soda or powder cleanser. One or two applications usually do the trick (read on for step-by-step instructions). If they don’t, you may need to spike it with ammonia (carefully). Just remember to rinse it all off with hot water and soap, and dry it off before putting it back where they belong.
Empty your sink. Make sure your grates aren’t hot from any previous cooking (safety first!). Remove them and put them in the sink. An empty bathtub or a big plastic bin can also work.
Pour hot (or boiling) water in the sink until the grates are completely covered. Squirt in a little dish soap while you’re at it. Let the grates enjoy the soapy soak for 10-15 minutes. This will help with breaking the grease down.
The soaking part is supposed to do most of the heavy lifting for you. Still, there might be some debris left after that you will need to take care of yourself. For that, you will need the aforementioned baking soda and sponge/scrubber. Start scouring away the things the soapy water couldn’t get rid of.
Rinse the grates to wash leftovers and soap off. Then, pick up a clean cloth and dry the grates completely. When you’re done, place them back and post about it on Instagram.