The Useful Life of a wiper
A damaged wiper blade cannot be expected to give good service. When you begin to see blemishes in your field of vision, it's time to change the blade.
A windshield wiper has no protective cover, of course. Even when not in use, it sits in its receptacle between
the windshield and the hood subjected to the wind, rain and sun, 24 hours of every day, 365 days of every year.
A wiper blade begins deteriorating the very minute it's installed to the vehicle.
reasons for deterioration
symptoms of damaged wipers
Visible damage
Splitting, cracking, corrosion, deformation,
foreign matter buildup and discoloration

Audible damage
Causes noise with blade vibration and chattering

Damage that can be felt
Hardening of the rubber, loose rivets

 wipers
wipers

Replacement Signs Visible on the Windshield
These are the signs of wiper deterioration visible on the front windshield glass.
These symptoms will help you determine when a wiper blade requires changing.
streaking
Narrow streaks are left on the windshield, making it hard to see.		 jumping
The wiper blade jumps across the windshield and makes a lot of noise. Unsmooth operation.		 spotting
The wiper leaves large, unwiped spots.		 uneven blade pressure
The rubber blade does not contact the windshield surface evenly, leaving a large unwiped surface.
Cause
Foreign matter has attached itself to the rubber blade, or the edge of the blade is worn.
Remedy
First, clean the edge of the blade. If streaks still appear, replace the blade.
Cause
The wiper blade does not move smoothly across the surface of the windshield, but vibrates noisily and bounces.
Remedy
First, clean the windshield. If the jumping persists, replace the blade.
Cause
Rubber deformation.
Remedy
Replace the blade.
Cause
Deformed wiper blade arm.
Remedy
Replace wiper blade.
once per year Windshield wiper blades unavoidably deteriorate with use, so it is best to replace them on a periodic basis. If you always ensure that your wiper blades are in good repair, you can enjoy a good field of vision and a safe field of vision even in inclement weather. Always change your wiper blades at least once per year. Changing wiper blades is a simple task that anyone can accomplish.