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All About Windshield Wipers -
A windshield wiper is used to remove rain and debris from the windshield, a laminated safety glass.
The wiper consists of an arm pivoting at one end (attached to a motor), and a long rubber blade attached to the other.The blade is swung back and forth over the glass, pushing water and debris from its surface.
Rubber is the most important part of the wiper blades. The sun's ultraviolet rays; automatic car washes; and extended periods of non-use take their toll on the wiper blade’s life. Signs that it’s time for a replacement include dry, cracked or split rubber; or damage to the wiper arm assembly, which result in streaking, chatter or scratching on the windshield. Wiper blades should be changed every six to twelve months, depending on environmental conditions and use.