Checking the condition of the windshield wipers and adjusting the washer nozzles (BMW 7 Series E38)

1. Over time, road film accumulates on windshield wipers, reducing their effectiveness, so wipers should be washed regularly in a mild cleaning solution.

2. Wiper blade assemblies should be inspected regularly. If inspection reveals hardened or cracked rubber on the blades, replace them. If inspection reveals nothing unusual, wet the windshield, turn on the wipers, let them run for a while, and turn them off. Uneven marks from the blades on the glass or streaks on clean glass indicate that the blades should be replaced.

3. If the wipers do not clean the windshield well enough, the reason may be wax particles that have gotten on the glass when the car passes through an automatic car wash. These particles can be removed by adding a detergent that has wax-dissolving properties to the windshield washer fluid.

4. If necessary, adjust the direction of the jet from the washer nozzle by turning the nozzle with a needle.