Wiper blades are made of rubber, so they naturally wear out after several months of wiping snow, rain and dust from your windshield. You could take your car to a mechanic to have them changed, but it’s just as easy to change them yourself.

The fitting process is identical for the vast majority of cars on the road. Windshield wipers are made with three basic parts: the lower wiper arm that extends from the base of the windshield, the metal or plastic blade attached to the lower arm, and the rubber blade that actually wipes the windshield.

When your windshield wiper blades are changed, you’re really only changing the rubber blades. To find out what size replacement blades you need, measure the old rubber blades using a ruler or measuring tape. You will need to purchase replacements at your local auto shop or retail store.

Here’s a video on the best way to change your blades: