Why you should change your wiper blades
Even if you don’t live in an area that gets much rain, your car’s wiper blades should be replaced every 12 months. Without even using them, the rubber blade gradually degrades due to exposure to heat, sunlight, pollution, and cold temperatures, and its wiping performance worsens. You don't want to discover the blades are dry, brittle and streaky when you activate your washer/wipers due to something suddenly making it hard to see out the windshield.
To avoid wear on the wiper motor, linkage, and the blades themselves, switch off the wipers when the rain stops to avoid putting unnecessary strain on them. In freezing conditions, make sure the wipers aren’t stuck to the windshield or rear screen before you using them. Check before you turn on the ignition in cars with automatic wipers.
New wiper blades are easy to fit, relatively cheap to buy and will boost visibility in bad weather, so they’re a wise investment.
This task requires no experience and usually no tools are needed. It’ll take you a couple of minutes.
You may want to save money and just replace the rubber element instead of the entire blade, but you will end up spending much more time doing it this way.