Previously, I was having an issue with my wiper blades streaking and smudging on the windshield of my 96 civic. I tried 2 different brands of wiper blades, the most recent being Honda factory parts from the dealer. I scrubbed the windshield with 91% alcohol, steel wool, and some other stuff I don't remember. Still smudging and leaving some streaks. Today I had a thought to try a different brand of washer fluid. I bought the prestone bug wash fluid from Autozone. No more streaks or smudges! Who would've thought... After I pumped the old stuff into a water jug to put in the Corolla, I ran about a quart of clean water through the lines to flush them out.