Rear wiper parking problems.

The rear wiper on my 1.8 freelander 1 no longer parks on the window rubber when not in use. Instead it parks at the lowere end of the 'wipe action'. When the wiper is turned off it should travel that little bit further to park on the rubber. Anyone got any ideas other than 'burn it' which is what we usually get from Disco and Fender people.

mine does the same sfter blasting it with a pressure washer some months ago, i presume one has to loosen the arm on the spindle and reset, but i haven't bothered to do mine yet.