Hi Malcolm, thanks for your reply :)
I will try to prise the grey cover if I can to see whats under it, I know the filter on the side is clean and not clogged, so I will post my results in a few mins :)
As for the cyclone part, just undid the screws and very slowly pulled of the top, it is kind of stiff like suctioned but I am a mere female and not that strong but I still managed to get it apart ;) Only thing that is tricky is when you put it back on the top you have to make sure the long thin black rod fits perfectly in the little groove at the bottom of the cyclone whilst lining up the top part, took me some time to do this on my own :(
Tina, September 2007