I recently installed the disco 1 wiper arm kit from roverparts.com. everything went on smooth and without problem. Today I purchased bosch icon blades to replace the ones that came with the kit because from the beginning they were streaky and had bad contact. Now with the bosch blades there is still not much contact with the windshield. It is not as streaky but there are large areas on both blades where it does not wipe. I tried reinstalling the arms but no change. any ideas?