The ceramic briquettes in gas grills provide reliable, even heat to grill burgers and roast chicken. Unlike charcoal, ceramic briquettes can last through years of regular use. But over time, the briquettes will become dirty from grease dripping down on them. If you notice your gas grill cooking unevenly, it's a sign that it's time to clean the briquettes. Once clean, your ceramic briquettes should function like new.
Turn all the briquettes over so that the greasy side faces down. Light the grill, then close the lid and turn the heat up to high. Let the grill burn on high for 15 minutes.
Shut off the grill and allow the briquettes to cool. Fill a sink with hot, soapy water. Line the bottom of the sink with a towel and dump the briquettes into the water. The towel keeps the briquettes from scratching your sink. Let the briquettes soak for a few minutes.
Scrub the briquettes with a nylon scrub pad or brush to remove any remaining grease and soot.
Rinse the briquettes in clean water and allow to dry before you return them to the grill.