1999 Buick Regal Wiper blades

Other Category problem
1999 Buick Regal 6 cyl Wheel Drive Type unknown Automatic 116691 miles

While driving in the rain I turned my wiper blades on and the one on the drivers side went past the window to the left and sort of sticks there. When I placed it back on the window it moves going down but it sticks again almost in a straight up position to the point where the blade on the right runs across the top of it. The blade on the left will not move and sticks there unless you move it with your hand. When you do that, it does the same thing again. Goes off the window to the left and sticks in the middle of the window. What can the problem be? It acts like it's getting stuck on something but there is nothing that I can see there to get stuck on.