Streaking occurs when the rubber squeegee dries, hardens and cracks. It can also be caused by tree sap, road tar and other foreign substances collected on either the glass or the blade. Skipping occurs when the blade develops a curvature from lack of use (e.g. left in the ‘parked position’ for an extended length of time). Wearing occurs with extensive use and is when the rubber edges are rounded instead of squared. Splitting is caused when the sun’s ultraviolet rays penetrate the rubber squeegee, causing it to breakdown and separate from the frame. Bent Refill Vertebra and Bent Frames cause inconsistent contact with the glass surface, creating streaking or skipping.
