How did your wipers perform during this last series of rain storms? Experts have cited that 90% of your driving decisions are based on an unobstructed and clear view of the road. If your wipers are dried out, cracked and not working properly, you are taking a chance that clear windshield visibility may be reduced to zero. Who wants to put themselves, others and your beautiful BMW at risk? Windshields are increasingly sloped model after model, to increase that ever important aerodynamics. Your wipers should be hugging the windshield properly on each and every sweep. You are looking for full, clean contact from the wiper to windshield. Over time, (not necessarily use), your wipers are exposed not just to the elements, but road grime and bug “stuff”. The abrasive action on rubber will basically eat away at that blade edge, causing uneven action across the window. Another factor is the tension of the wiper arm. After months of driving at highway speeds, the wipers arms are taking the force of the wind. A good quality wiper blade arm will be designed to withstand this tension. If your wipers become really worn out and the clips or “claws” are coming in contact with your windshield, you run the risk of permanently damaging your windshield. If you hear some scratching noise, it may be to late!