See also:

Replacement of wiper blades
Grease, wax, insects, or other material 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 windshiel ...

Other markings
The following makings are also placed on the sidewall. ...

Fuel
Use of a fuel which is low in quality or use of an inappropriate fuel additive may cause engine damage. ...