Look for streaking on the windshield, chattering noises, visible damage to the rubber edge, or a loss of flexibility in the blade.

Windshield contamination is a common cause for poor wiper performance even if the wipers are still in good shape. Some kinds of contamination, such as tree sap, can destroy the wiping element in a short time. We recommend cleaning the windshield regularly with car wash soap as regular dish soap or hand soap can be corrosive to car paint.

It is recommend replacing wiper blades every 6-12 months, depending on usage and weather conditions.