If the grates are really dirty, soak them a second time to help soften and remove more gunk without expending extra elbow grease. Or, try the new Sienna Grilltastic Grill Steam Cleaning System. Fill this electric scrubber with water, plug it in and in seconds the combination of the dishwasher-safe stainless steel brush head and hot steam will be blasting grease from your grates. (It cleaned our GH Test Kitchen grill so well, our recipe testers asked if they could keep it.) Finally, rinse the grates well and let them dry.
Check the fuel lines for visible defects. If any fuel lines have unmistakable damage (like rips, holes, cracks), replace the parts immediately before your next use of the grill. Also be sure that any fuel lines have a smooth trail. You don’t want any of your fuel lines to be bent, because that will prevent the gas from flowing correctly. Check the exterior of the gas tank for any damage as well; things like dents, erosion, punctures, or any evident signs of damage. If you find areas that have obvious damage, you could potentially have a gas leak.
If you've purchased a new Weber grill, the company says that seasoning the cast iron grates isn't necessary. A porcelain enamel coating is already added to the cast iron so you don't need to season it at all. Instead, they recommend that when using a grill for the first time, you turn up the heat for about 15 minutes, then brush it clean with a stainless steel bristle brush.
One school of thought suggests that applying the pepper before cooking can cause the pepper to burn while you cook it, imparting a bitter flavor. Followers of this school suggest grinding pepper onto the steaks after searing them, or right before serving. The other school simply seasons their steaks with freshly ground black pepper before cooking and doesn't give it a second thought.
Prepare the corn. Trim the silk from the top of each ear to prevent it from catching fire and burning. Peel away the first layer of husks and remove the stalk end using a serrated knife to expose the bottom of the ear. This will make it easier to slide the ear of the husk, post grilling. (Optional: Peel back a 1-inch section to expose the kernels and char some of the corn.)
Certain practices can help discourage deposits of dirt and grease from forming in the first place. One method is to grease the grates of your hot grill with a little cooking oil right before your start cooking. In the same vein, scrubbing your grill grates with a raw onion is another tactic you can try. If you do have a grill brush without bristles, it's a good idea to scrape your hot grates both before and after grilling.
If scrubbing isn’t your thing, there's Carbona’s 2-in-1 Oven Rack and Grill Cleaner. This kit contains a large zip-top bag and a 16 oz. bottle of cleaner. Simply place your grates in the bag, pour in the liquid, seal the bag and shake gently so the cleaner coats the racks. Let it sit (away from children and pets) eight hours, or even overnight. Afterward, remove the racks from the bag, lightly scrub away any stubborn residue and rinse them well. In our GH Institute Cleaning Lab tests, even grates from a charcoal smoker came out clean with virtually no effort, thanks to this product.
Check the ignition system. Turn the gas off, and test your ignition button to see if it creates a spark. If both the pressure regulator on the gas tank and the ignition system are running normally (meaning the pressure regulator is tracking and maintaining correct gas tank pressure, and the ignition system is sparking and lighting correctly), you can finish testing the grill by turning the gas back on and lighting the grill up as you normally would.