Anyone else have an issue with the rear wiper not completely clearing the glass? Mine seems to leave a 3" oval of dirt slap bang in the middle of my view, I've replaced the wiper and arm (patten part) which cured the problem for about a fortnight. Do OEM parts solve this?

 

 

I had the same issue with mine but a new blade seemed to solve it an it has never come back (had the issue from new with the blade that was fitted in the factory and just bought the cheapest aftermarket one I could find which has worked great).

This usually happens when the hinge and spring get corroded, clean hinge and oil spring and pivot point, a good quality blade will also make a difference,  i alays used Bosch with good results. 

Will try a Bosch blade, cheers

try removing the cap, this was the solution for me