Cleaning a gas grill is quite easy - simply turn the burners on high and allow them ample time to burn the excess grease and food from the grates (usually if turned on high, the burners will remove most food particles within 5-10 minutes). You can then take a wire brush and brush the steel grates so that they are clean (if your gas grill has ceramic grates, then follow the manufactures' recommendations). If all else fails, you can always use a damp cloth to wipe ceramic grates clean.