Grill elements can get damaged over time. Replacing certain parts and giving the grill a good cleaning will prepare it for the season to come.
Step 8: Reassemble the grill. With the grill clean, it's time to reassemble. Set the replacement flavorizer bars into place, and then insert the replacement grills. If your grill takes lava rocks, follow the instructions to replace them. With the grill reassembled, turn on the gas supply, press the igniter and throw on a steak to kick off another season of grilling. Insert the replacement flavorizer bars.
Always detach the propane tank from the grill before attempting disassembly or repair. Follow the specific instructions and warnings in the product manual that came with your specific grill. Wear gloves and protective eye wear when scraping.