While the grill grates and flavorizer bars are removed and soaking, tackle the caked-on gunk in the firebox. Put another bucket underneath the firebox where the grease tray sits to collect debris. The easiest way to start is with a wet/dry shop vacuum, whether full-size or a portable, like Milwaukee’s M18 hand vacuum. Since wet/dry vacs are mostly workshop items, you won’t feel bad about using one to suck up the gunk that’s collected in your grill. You can use the grill brush to help loosen stubborn stuck-on grit. If the deposits are really caked on, dip the wire brush in the bucket of soapy water and get to work. Use a hose to rinse it out when it’s clean.
You also want a cooler, medium heat area of the grill to move the steaks to once they're seared and crispy on the outside. If you have enough burners and space on your grill, set them to a lower heat; if you don't have enough room, simply turn off the burner. If you are using a charcoal grill, one side should have a hot fire while the other a smaller, cooler flame.
Re-assemble all the parts you removed, taking care to fix the burner tubes back in place in proper position with the cotter pins or screws. Rub cast-iron grill grates with a light coating of vegetable oil. Finally, re-connect your propane tank and fire up the grill; let it heat for at least 15 minutes, then turn it off again. This will help burn off any residues from cleaning, season cast-iron grill grates, and serve as a check that you re-assembled everything properly.
After the grates and panels have soaked, take them out and scrub them thoroughly. A long handled grill brush offers added leverage. For really stubborn gunk, a paste of vinegar and baking soda helps the brush scrub off the worst bits. Rinse them clean. Take care to thoroughly dry cast-iron grates. Now’s a great time to inspect porcelain grates for chips that may lead to rust later on.
New grills oftentimes come with pre-seasoned grates, however, for those looking to care for an old favorite or cast-iron grates with build-up of cooked-on drippings, follow these simple steps to completely re-season or maintain the regular care of your BBQ grill. Seasoning grill grates is not only a good way to care for and prolong the life your your grill, but ensures the food you’re cooking is free from carcinogens and at its tastiest every single time.
According to Taylor, you'll be able to find this tool in stores, and it's also sold online by Amazon. If you can't wait that long, then use a nylon brush, but make sure to do this only when the grill is cold. Another option is the $15 Sumpri Grill Brush and Scraper. It's made out of stainless steel and is bristle-free, too. While I haven't used it personally, it appears to be popular with Amazon shoppers.
Like a boxing ring, it’s hard to knock out your opponent in the first round. Same goes for the Blackstone and the tension between the oil and steel. One round ain’t gonna cut it. To make the best non-sticking and tasty surface your meals deserve, you’re gonna have to repeat the seasoning. So be patient and make it count. Grab your oil again, dab it on the griddle, and watch the heated smoke-fest again. You should stop when the griddle plate is dark brown, and that takes around 2 to 3 times.
Clean the cook box. Remove the cooking grates and use a stainless steel cook brush to brush all the excess grease and debris from inside of the grill into the collecting bottom tray. Then, remove the bottom tray and throw out the collected grease and debris. Some of the debris will be loose and easily disposable, whereas other debris will be caked on. You might need to use a scouring pad or a sharp putty knife to remove the stuck on debris.