How often should you replace your wiper blades?

AUSTIN (KXAN) -- Replacing windshield wiper blades depends on a few factors, but most experts recommend replacing them within a certain timeframe.Meteorologist Tommy House sat down with Daniel Armbruster, who is a spokesperson for AAA Texas, to learn more about windshield wiper maintenance.Read an edited version of the conversation below or use the video player above to listen.House: How often should you replace your windshield wipers?Armbruster: AAA did a study a couple of years ago, and did yo