Your Wipers Smear Because You Are Replacing Them Wrong, Not Because They Are OldYou flick the wipers on in the first real downpour of the season, and instead of a clear windshield you get streaks, smears, and that maddening chatter as the blades skip across the glass. Most people assume the wipers are just worn out and slap on a new set, but the streaking often has nothing to do with age. The way wiper blades are chosen, installed, and maintained is where most drivers go wrong, and it is the reason a "new" blade can smear just as badly as the old one.Why Wipers Streak In The First PlaceA wiper blade works by pressing a flexible rubber edge flat against the glass and dragging a thin film of water away. Anything that stops that edge from making clean, even contact causes streaking. The usual culprits are a hardened or torn rubber edge, a build-up of wax, road film, or grease on the glass, and a blade that is bent or held off the windshield by a worn frame. Replacing the blade only fixes one of those three problems, which is why so many people swap blades and still get streaks.The Clean-Glass Step Everyone SkipsBefore you ever blame the blade, clean the windshield properly. A surprising amount of wiper streaking comes from an invisible layer of oily road film that fresh blades simply smear around. Wipe the glass down with a dedicated glass cleaner and a microfiber towel until it squeaks, and run your fingertip across it to feel for grit. While you are there, wipe the rubber edge of the blade itself with a damp cloth, because dirt clings to it too. Half the time, a thorough cleaning brings a "dead" wiper back to life.Buying The Wrong BladeWiper blades are not one-size-fits-all, and grabbing the wrong length or the wrong connector is a common mistake. The driver and passenger sides are frequently different lengths, so buying two identical blades can leave a strip of glass uncovered. Check your owner manual or the in-store fitment guide for the exact sizes, and match the connector type to your wiper arm. A blade that is too long will hit the trim or overlap the other blade, and one that is too short leaves a blind spot right where you need to see.Installing Them So They Actually SealEven the right blade streaks if it is installed loose or at the wrong angle. Make sure the new blade clicks firmly onto the arm so it cannot wobble, and check that the rubber sits flat against the glass along its whole length. When you lower the arm back down, do it gently rather than letting it snap onto the windshield, which can bend the frame. If your blades chatter, the arm may be slightly twisted so the edge is not meeting the glass squarely, and a careful tweak can fix the angle.Making A Set LastWiper rubber is destroyed by sunlight and heat as much as by use, so blades parked under a baking sun harden and crack faster than the mileage would suggest. Lift the blades off the glass in icy weather instead of letting them freeze to it, never run them on a dry windshield, and keep your washer fluid topped up so you are never scraping dust. Clean the glass and the blades every few weeks and you will replace wipers far less often. While you are working through these small habits, it is worth confirming you are jump-starting your car correctly, keeping your tires rotated, and paying attention to any shake when you brake. Clear vision is cheap insurance.AdvertisementAdvertisementCheck out: 10 Best Safety Items for Your CarJoin our Newsletter, follow our Instagram page, and connect with us on Facebook.