ETOCWEN
I have an annoying problem with the wiper blades leaving a black film on the windscreen at each end of the wipe. This results in a vertical line next to the door pillar and a diagonal line in the middle in front of the driver. These line won't just wash off, they are greasy and stubborn to remove even using methylated spirits. The Cali is only 6 months old, so Firstly, is this a common problem with the T6? has anyone experienced this problem before.