RJ2,
It sounds like your wipers are not "parked" far enough down on the windshield. Lift the wiper arm off the windshield. Take a small screwdriver, gently pry out the retaining tab that locks the wiper arm to the pivot shaft. Release wiper arm. It should be in a locked position off the windshield. Lift arm off shaft and reposition wiper closer to the bottom of the windshield. Its a splined shaft w/ no master spline. Pull up on wiper and push the locking tab back in.