The cleaning frequency of windshield wipers should be determined based on the usage environment and maintenance habits. Normally, windshield wipers need to be replaced every 1 to 2 years. However, with proper maintenance (such as avoiding dry wiping and promptly removing ice buildup in winter) and in the absence of aging signs like residual streaks after wiping, abnormal noises, or cracks on the blades, their service life can be extended to 3 years. It is particularly important to note that if the glass becomes blurry after wiping, the blades develop serrations, or a screeching sound occurs during operation, the wipers should be replaced immediately to ensure clear driving visibility in rainy weather. Choosing wipers that match the original equipment specifications and regularly inspecting their condition are key to maintaining optimal performance.