P.B.
There are two things I would recommend. One is the cleaner that we used for years for a stove top that we used to have. It was the cleaner you use for Corningware cooktops. Unfortunately I can not remember the name of it, but I know we bought it at Sears and would think they would know what that is. The second would be Softscrub with bleach. This works as well but it takes more scrubbing time, and extra rinsing time or you have that streak problem. Hope this helps.