Windscreen wipers and windscreen clear are major contributors to road safety.
A wiper blade travels on average 800km across the windscreen every six months. Sun, wind and heat can have negative effects on wiper blade rubber, turning it porous and making it crack and become stiff. Damages wiper blades can leave a greasy layer or marks on the windscreen, or squeak or vibrate. If any of these thing happens, you must replace your blade immediately. A dirty or obscured windscreen is extremely dangerous.