Originally Posted by Pinch
Sometimes I find its a combination of a dirty windshield, worn/contaminated wipers AND a dirty windshield inside the car.. Just a thought.
On the inside, a scrubber type sponge soaked in Windex can remove a goodly amount of the gunk that builds up, then scrub with decent paper towel. Before quitting, rub thoroughly with a good clean microfiber towel. Betwixt washes, just scrubbing with a good clean microfiber can help.
Clean windshield facing very bright sunlight if possible--it is almost impossible to see small streaks and film on it in a garage.