The wiper arms should be connected to a multi-grooved post and can be adjusted by removing the wiper arm connecting nut (after lifting the flap that hides it), then gently sliding the the wiper arm off the post and moving it to where it should sit on the windshield. It's not hard to do, just hard to explain with words. If you try this, make small adjustments to the arm, tighten nut, and test. If not right, try it again.