wipers are wiping but not fully going to the bottom and not fully going to the top-position as they should. I don't really want to force the wipers down or anything incase soemthing gets damaged.

any idea on a solution?

note: [all the blades and arm are fine]

the nut and splines holding the arm on? At work
At home

"I can't always believe facts I read on the web" - Charles Dickens

winner by default of the tractor vs caravan race

Try lifting the caps that cover the 13mm nuts locking the wiper arm down on the tappered splinned head of the wipper mount and check they are tight.
What can happen is when a heavy load is moved, "snow or the wipers have stuck to the windscreen with ice" the wiper arm trys to lift up the spline. If this happens then the locking nut has become loose and the arm will rise up the spline and will not travel all the way as you have discribed.
Usually you just need to reset the wiper arm in the lower position on the windscreen, tighten the nuts but not to tight and replace covers and all should be fine.
If this does not fix it then further investigation is needed as you may have bent the linkages controlling the arms. this can be checked by removing the the black plastic trims below the wiper arms.
Be awear that you will have to remove the wiper blade arms first

many thanks for your replys.

nuts are tight and everything is secure.

i was thinking to open everything up but it seems like it might be complicated. car is still under warrenty so i'll get LR to take a look.