Hi, This is my first post in this forum and I have to confess I'm not a massive source of knowledge for cars so am hoping someone can help. Like everyone at the moment, my windscreen is getting extremely cold at the moment and frosing up overnight. When I turn my heated windscreen on it appears to clear certain parts of the screen. It isn't as simple as the left hand side being cleared and the right hand side not (or vise versa). It is clearing certain parts only, so that it looks vertically streaky. The streaks are different widths, but unless I turn on my fan these areas are not clearing. As far as I know the heated windscreen should do the whole front window and not certain streakes. Does anyone know if this may require a new windscreen, or if the problem may lie elsewhere?