See also:

Windshield wiper and washer switches
The wiper operates only when the ignition switch is in the “ON” position. ...

R (Reverse)
This position is for backing the vehicle. To shift from the “N” to “R” position, stop the vehicle completely then move the lever to the “R” position. ...

Replacement of wiper blades
Grease, wax, insects, or other materials on the windshield or the wiper blade results in jerky wiper operation and streaking on the glass. If you cannot remove the streaks after operating the wind ...