Works pretty well on fireplace glass doors
I use my heating fireplace to help heat my home.  The glass doors always get coated with creosote. This door cleaner works pretty well.  It removes minor to mid level coatings of  creosote.  A more heavier coating is more than this conditioner can handle.  So I try to get at it more often.  It takes a bit of elbow grease, but it eventually works and leaves the glass crystal clear. Over all it's pretty good stuff.
Rating: 4 stars