We bought last Feb. the entire suite of Frigidaire Gallery Professional appliances for our kitchen.  The gas/propane cooktop I really like and the stainless steel is easy to clean with SS cleaner and a microfiber cloth.  My complaint is the grates.  I wipe them down after every use and regardless of what I wipe them with, they get the cloth fuzz balls on the grates which make them look dusty.  I've tried different types of cloths, but nothing seems to work.  I just cleaned them again with a fine toothbrush and am letting them air dry to see if that helps.  Any suggestions.