FYI PEOPLE! The back windshield had an automatic wiper. The motor is located in the door of the back hatch. This sucker...came loose! That scratching noise may not be a bad blade on you window. Its very possible its the bolts holding the motor to the inside of your door. I turned on the back wiper, hit a pot hole, that thing came off completely! Motor fell inside the door and took the back windshield with it! Thank God for Safelite repair. They came to my house, vaccuumed out all the glass, replaced my window and gave me a lifetime warranty!!!!