1: take care not to open the wiper, because if there is no water on the front glass, wiper wear will increase, affecting its level.
2: when the rain is, if the windscreen is too dirty, use a wiper motor spray it spray water glass water, to increase his degree of lubrication, and keep alive the good Wiper Blade surface sophistication.
3: remember to always check the water level in the Water Kettle, missing time.
That's all, if there was a scrape dirty or blurred when using, you need to replace the wiper blades, if still fuzzy after replacing wiper blades. Then check the elasticity of the wiper arm is normal, if the elastic reducing the need to replace the wiper arm off.