Hi, just a quick hello from the sunny Canary Islands. I have a 2008, 84hp, pulse, red / black. I love whipping through the winding mountain roads, the performance is oustanding. One small problem - the black glass roof has developed a nasty "rash" of some sort. It is as though I´ve driven through a calcium spray and it has dried on the roof as a deposit from front to back. I have tried all sorts of cleanser, including the one for vitrous glass kitchen hobs. No luck so far, any help would be appreciated.