Originally Posted by ZMan8

Well having to replace wiper blades after a few months is abnormal, therefore, covered by warranty. In that situation its easy to prove its a manufacturing defect. Especially since it's hard to accelerate wiper blade wear. Tires and clutch are easy to wear out quick depending on driving habits.

Edit: also if wiper blade is streaking, check to see if you have any minor chips in the windshield.