FORD 2000 F-550 v.1 - Manual (Page 220)

Cleaning the exterior lamps
Wash with the same detergent as the exterior of your vehicle. If
necessary, use a tar remover such as Ford Extra Strength Tar and Road
Oil Remover (B7A-19520–AA).
To avoid scratching the lamps, do not use a dry paper towel, chemical
solvents or abrasive cleaners.
Cleaning the wiper blades, windshield and rear window
If the wiper blades do not wipe properly, clean the wiper blade rubber
element with undiluted windshield washer solution or a mild detergent.
To avoid damaging the blades, do not use fuel, kerosene, paint thinner or
other solvents.
If the wiper still does not wipe properly, this could be caused by
substances on the windshield or rear window such as tree sap and some
hot wax treatments used by commercial car washes. Clean the outside of
the windshield or rear window with a non-abrasive cleaner such as Ford
Ultra-Clear Spray Glass Cleaner, (E4AZ-19C507–AA), available from your
Ford Dealer. Do not use abrasive cleansers on glass as they may cause
scratches. The windshield or rear window is clean if beads do not form
when you rinse it with water. The windshield, rear window and wiper
blades should be cleaned on a regular basis, and blades or rubber
elements replaced when worn.
Cleaning the instrument panel
Clean with a damp cloth, then dry with a dry cloth.
Avoid cleaner or polish that increases the gloss of the upper portion of
the instrument panel. The dull finish in this area helps protect the driver
from undesirable windshield reflection.
Do not use chemical solvents or strong detergents when cleaning
the steering wheel or instrument panel to avoid contamination of
the air bag system.
Cleaning the instrument cluster lens
Clean with a damp cloth, then dry with a dry cloth.
Do not use household or glass cleaners as these may damage the lens.
Maintenance and care
220