Since I bought my F25 I've struggled with getting the wiper blades away from the 'screen when it's wash time.  I decided to check the handbook, and it details the process (ign. off, wiper switch past the resistance, etc, etc), but following the instructions 
to the letter I can't get the arms/blades to budge.   
 
 
Is there likely to be a problem with the car, or just "operator error"?