If your car is 'old', make sure the wiper arm tension is correct. If the car is new and you suffer from the windshield smearys, make doubly certain the glass is clean! Not 'it-looks-clean' clean, but REALLY clean. While you're at it, clean the wiper blades, too.
It used to really tick me off to buy a new set of blades and still see smears.

Then I discovered Autopia and the concept of C-L-E-A-N.

If the glass is REALLY CLEAN, Wally World's cheapos should do the job just fine.
