I found something that really helps. It's a windshield washer fluid booster. You add 1 ounce to a ful reservoir. It gets rid of all the road grime and oil, which is what usually ruins wiper blades. I've been using the stuff for over a year now, and it has increased my wiper blade life to like 7 or 8 months. and an 8 ounce bottle of it is only $10. Well worth it to me. Oh yeah, google P21S windshield washer booster, and you'll find it.