My wipers wipe the screen when parked, however when i'm on the road the blades don't touch the screen. even at low speed. I am assuming the fix is a new set of wiper arms as the springs appear to keep the wiper blades pressed against the screen and they are 1990 origionals.
Just in case anyone asks, yes I have changed the blades, plus slightly increased the bend on the arms to increase the pressure, all no no avail.

Many thanks
Paul