I have el cheapo plylon or whatever and change them every 3 months ($3 at walmart) according to the severe duty maint. schedule.
Also, rain-x makes pink winter and green summer windshield washer fluid and if you use it, you don't have to use your wipers much unless you drive thru a hurricane/mud bog/behind a coal burning truck
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'98 Tropic Green Tour SE Sport V-6 ATX
"I promise I wont modify it honey, it's a family car!"