Vehicle

When to Replace Your Wiper Blades (and How to Check)

Wiper blades wear out quietly. They work fine on a dry week, then the first heavy rain or slushy highway shows you a smeared windshield at exactly the wrong moment. A cheap, five-minute job keeps that from happening.

The short answer

Replace your windshield wiper blades every 6 to 12 months, or sooner if they streak, skip, or squeak. The rubber breaks down from sun, heat, ice, and road grime whether you use the wipers or not, so a car that sits in a sunny driveway can need new blades as often as one driven daily in the rain. Drivers in hot, sunny climates should lean toward every six months; in milder climates, once a year is usually enough.

Signs your blades are worn out

• Streaks: thin lines of water left behind after each pass.
• Smearing: a hazy film across the glass, especially noticeable at night under oncoming headlights.
• Skipping or chattering: the blade bounces across the glass instead of gliding smoothly.
• Squeaking or scraping noises on a wet windshield.
• Unwiped patches: sections of the windshield the blade no longer reaches or clears.
• Visible damage: cracked, split, torn, or hardened rubber, or a bent or rusted frame.

A two-minute check you can do at home

1. 1Lift each wiper arm gently away from the windshield. Most arms lock in the raised position.
2. 2Look along the rubber edge. It should be straight, flexible, and clean, with no nicks, splits, or rounded-off edges.
3. 3Run a fingertip lightly along the wiping edge. Rough, gritty, or brittle rubber means it's time.
4. 4Flex the rubber slightly. If it feels stiff or stays bent, it has hardened and won't conform to the glass.
5. 5Check the frame or beam for bends, corrosion, or loose joints, then lower the arm back down slowly.
6. 6Spray washer fluid and run the wipers a few passes. Streaks or chatter on a clean, wet windshield confirm the verdict.

If the blades look fine but still streak, clean them first. Wipe the rubber edge with a cloth dampened with washer fluid or rubbing alcohol until no more black residue comes off, and clean the windshield thoroughly. Road film and wax on the glass cause a surprising amount of streaking. If that doesn't fix it, replace the blades.

How to replace them yourself

1. 1Find the right sizes. The driver's and passenger's sides are often different lengths, and many vehicles have a rear wiper too. Check the owner's manual, measure the old blades, or use the lookup at any parts store or on the blade packaging.
2. 2Lift the wiper arm and lay a folded towel on the windshield beneath it. A bare metal arm snapping back onto the glass can crack it.
3. 3Find the release tab or clip where the blade meets the arm, press it, and slide the old blade off. Most cars use a simple J-hook connector.
4. 4Slide the new blade on until it clicks into place, then give it a gentle tug to make sure it's secure.
5. 5Lower the arm carefully, repeat on the other side, and test with washer fluid.

Blades range from basic frame-style designs to beam and hybrid blades, which hold more even pressure on curved windshields and resist ice buildup better. Most people can do the whole job in under 10 minutes, and parts stores will often install them for free if you buy there.

Make them last longer

• Never use the wipers to clear ice or heavy snow. Scrape and defrost first, and make sure the blades aren't frozen to the glass before switching them on.
• Don't run wipers on a dry windshield; always use washer fluid. Dry passes grind grit into both the rubber and the glass.
• Keep the windshield clean, and wipe the blades down whenever you fill up with gas.
• Park in the shade or a garage when you can. UV and heat are the biggest causes of hardened, cracked rubber.
• Use a winter-rated washer fluid in cold climates so it won't freeze in the lines or on the glass.

Make it automatic

Wiper blades are the definition of easy to forget, since you only notice them when you need them. Add your vehicle to Upkeepery and it schedules a blade check every fall and spring, reminds you when replacement is due, and keeps a record of the blade sizes so you buy the right ones the first time.