The wipers have to move a little bit, so they can have the blades changed, and if there was no spring they would not pull onto / clear the screen!
What i am trying to say is, they dont NEED to pull up to the point they hit the bonnet to do what they were designed to do, so how can there be a problem with them?
Because in every other make of car this is not the case. It does not state in the manual that the clio is different and needs to be done a different way. Therefore it is not a satisfactory product (car) as it is not unreasonable for me to expect to lift my windscreen wipers, if I have not been told that the windscreen wipers are not supposed to be lifted.