Removing White Film on Glass Ceramic StovetopI have a glass ceramic stovetop and have a white film on two of the burners. My husband seems to think they look like calcium buildup, but I don't know. Two of the burners are fine. How do I remove the white film from two of the burners? I tried ceramic cleaner for stovetops, white vinegar, and dish detergent. Nothing takes the film off. What do I use?