Anyone know how to make a homemade cleaner for a smooth top stove? We got one several months ago and it has some areas that won't come clean with the little sample bottle of cleaner we received with the stove. I don't want to purchase a huge container of the same thing since to me, it doesn't work that well. I was thinking of a baking powder paste with something mildly abrasive but don't want to scratch and damage the surface. This is what I get for letting a teen boil over a pot of spaghetti sauce!---Kathy