Bar Keepers Friend Cooktop Cleaner and 47 other household cleaning aids were tested by Owens-Illinois for safety and effectiveness on the glass top.  They found that Bar Keepers Friend Cooktop Cleaner did not scratch, did not attack the surface at high temperatures, and was very effective in removing stains.  

Bar Keepers Friend Cooktop Cleaner prevent nicks and scratches on smooth top ranges, while effectively removing surface residue. This powerful yet gentle formual leaves your cooktop shining.

Bar Keepers Friend Cooktop Cleaner is safe yet effective to clean away your toughest stains. Bar Keepers Friend Cooktop Cleaner is safe for cleaning and polishing all radiant and halogen glass or certamic cooktops and glass cookware.

Bar Keepers Friend Cooktop Cleaner cleans stovetop by gently removing food residue, stains and fingerprints without scratching ceramic and glass stovetops, polishes by bringing out the original luster, and protects by leaving behind a protective shield to guard against future staining

Bar Keepers Friend Cooktop Cleaner is ammonia and silicone free, and food-safe.

Use normal cleaning procedures when using Bar Keepers Friend Cooktop Cleaner.  It is best to use a soft damp cloth.  DO NOT use abrasive pads such as steel wool.  These will scratch the surface, making future staining easier and the stains more difficult to remove.