i had exactly the same problem!! i took mine to the garage yday and the mechanic fixed it for free!! took 5 minutes! the mechanic says when you put the wipers on when the screens frozen it puts the wiper arm out of allignment.
there is a 13mm nut that holds the wiper arm onto the spindle. take the cap off the nut, loosen the nut off, then push down on the arm and pull it towards the bonnet aswell. then tighten up the nut again and problem solved!!
silva1210
April 2010