When should you replace windshield wipers?

Replacing windshield wipers when they leave streaks is a proactive approach to maintaining visibility and safety while driving. Streaks indicate that the wipers are not making proper contact with the windshield or that the rubber blades have become worn, damaged, or contaminated. This can significantly impair the driver's ability to see clearly, especially in adverse weather conditions such as rain or snow. Regularly checking wiper performance can help ensure you have a clear view of the road ahead.

While the other options may suggest reasonable maintenance practices, they don't directly address the immediate need based on the condition of the wipers. For instance, changing wipers every 2 to 3 years might not take into account individual usage and environmental factors that can wear out wipers more quickly. Similarly, replacing them once a year in spring doesn't consider pre-existing wear that could already be affecting visibility. Lastly, only replacing wipers if they are visibly damaged could lead to compromised safety on the road if subtler issues, like streaking, are ignored. Therefore, monitoring performance and replacing wipers when streaks appear is the most effective and appropriate approach.