Yes, quite an easy fix. Remove wiper blades, then the front screen cover disconnecting a small electric plug and windscreen washer pipe. Now remove the under wiper heat shield (3x10mm bolts) slide this out towards front of car. Undo wiper motor and arm support (again 3 x 13mm bolts) Disconnect electric plug to wiper and remove whole unit. It is a tight fit but remove the motor end first and the rest will slide out. There are one or two wires clipped to this unit and they need to be pushed away. Now remove an arm from each end and see how well the units move. To clean and re-grease, remove circlip and, small o-ring and push spindle out (this may be tight and require heating the outer unit - don't hammer the thread.) Now clean both internal and external parts some they are smooth. Grease and replace. Check for free movement and if OK re assemble. Now replace arms and replace in vehicle. Reverse procedure of removal. Don't forget to clip the wires back to the unit. Good luck.
David, July 2010