Originally Posted by John 070
I can give another reason for poor performance of the wipers....it had me baffled on my Nissan (through the course of time, new windshields, new wipers, still doesn't work right). The wipers have a linkage where when worn, the arm cannot put the correct pressure on the glass. I kinda doubt it's the case on the '06 unless the OP lives in Seattle or something. BMW has TSBs about what angle the wiper should be wiping, that's how nuts the Germans are. To have the dealership perform the TSB out of warranty shouldn't be too bad, maybe $600-$700 LOL
Good point. My old Mercedes had a special tool to adjust the angle of the wiper arm. If it wasn't adjusted right the blades would streak and squeal like a pig. I adjusted that before changing the blades but after the Rain-X.