1. Dirty or Dry Wiper Blades: This is the most common cause. Over time, the rubber on the wiper blades degrades, cracks, and loses its flexibility, leading to squeaking. Dirt and debris also build up on the blades, further exacerbating the problem.
* Solution: The simplest fix. Replace your wiper blades. Check your owner's manual or an auto parts store for the correct size. Many auto parts stores will even install them for you. Consider getting beam-style blades; they often perform better than the older "J-hook" style.
2. Dirty Windshield: A dirty windshield provides a rough surface for the wiper blades to move across.
* Solution: Thoroughly clean your windshield with glass cleaner and a microfiber cloth. Pay special attention to any stubborn dirt or grime. For really stubborn spots, you might need a dedicated glass cleaning product and a razor blade scraper (use cautiously!).
3. Damaged Wiper Arms: Bent or rusty wiper arms can cause uneven pressure and squeaking.
* Solution: Inspect the wiper arms carefully. If they're bent, you might be able to carefully straighten them (use caution, as bending them too much can break them). If they're severely rusted, you'll likely need to replace them.
4. Worn Wiper Pivot Points: The points where the wiper arms connect to the wiper mechanism can wear out, leading to squeaking. These often have a small lubrication point.
* Solution: You can try lubricating these points with a silicone-based lubricant (like silicone spray or WD-40 – but *be cautious with WD-40*, as it's a solvent and can damage some components over time. A silicone-based lubricant is generally preferred). Apply sparingly and move the wipers back and forth to distribute the lubricant. If this doesn't work, the pivot points might need replacing. This is often a more involved repair.
5. Improper Wiper Blade Installation: If the blades aren't installed correctly, they won't make proper contact with the windshield.
* Solution: Double-check the installation of your wiper blades. Ensure they're securely attached and aligned correctly. Consult the instructions that came with the new blades.
Troubleshooting Steps:
1. Start with the simplest solutions: Replace the wiper blades and thoroughly clean the windshield. This often solves the problem.
2. Inspect the wiper arms: Check for bends or rust.
3. Lubricate the wiper pivot points: Use a silicone-based lubricant sparingly.
4. If the squeaking persists: The problem might be more serious, requiring professional attention or replacement of parts.
Remember to always disconnect the battery's negative terminal before working on any electrical components of your vehicle. If you're not comfortable working on your car, take it to a mechanic.
