Just installed new wipers on my Disco. Decided to stick with the original D2 wiper arm setup and Atlantic British wiper blades. Front drivers side wiper works fine but the passenger wiper blade does not wipe all the fluid off its portion of the windshield like it should. On visual inspection the wiper blade appears to be flush on the windshield but there results say otherwise. Is there anyway to adjust how the wipers clean the windshield?

 

New wiper arms, there are springs in the arms that hold the wiper blade to the glass, it gets weak.
Depending on the type of wiper blade you bought some require more force to press against the glass than others.
Yet still if you use those "Euro" wiper blades on some cars, specifically vans, the aerodynamics of the van lifts the wiper blade off of the glass.

 

You can try and clean the spring on the wiper arm and to also spray it with a lubricant. Find a lubricant that doesn't collect a lot of dust / dirt to it.

If you don't have any success with that then new wiper arms as Spike has said.

 

Probally just replace it then. AB sells genuine arms for only $44. The previous owner purchased 1 new genuine drivers side wiper arm and gave it to me! Just installed it last week lol. That would explain why the drivers side works so much better than the passenger side..