Drive Belts
Inspect all drive belts for evidence of cuts, cracks, excessive wear or oil saturation and replace if necessary. Drive belts should be checked periodically for proper tension and adjusted as necessary.
See also:
Mist Wiper Operation
If a single wipe is desired in mist, move the windshield wiper and washer control
lever up. ...
Check spark plugs and ignition system
Inspect your spark plugs as described in section 7 and replace them if necessary.
Also check all ignition wiring and components to be sure they are not cracked, worn
or damaged in any way. ...
Blade inspection
NOTICE
Commercial hot waxes applied by automatic car washes have been known to make
the windshield difficult to clean.
Contamination of either the windshield or the wiper blades with foreign mat ...