Grates can be cleaned in the dishwasher, however after cleaning it is a good idea to apply a small amount of cooking oil to the grate then bake the grate in an oven at 350F for 10 minutes. This baking process protects the finish of the grate.
Burners can be cleaned with vinegar or ammonia. Do not use any type of abrasive cleaner as the abrasive residue might block the gas jets. After cleaning, make sure the burners and burner caps are level and firmly set in place. Improper installation of these items can lead to erratic lighting.