From a principle perspective, the sandpaper polishing method is effective in reducing the cleaning effect caused by the aging of the rubber strip of the wiper blade. Therefore, when we find that the wiper cannot clean the glass, we should first determine the cause. If the wipers tremble or make abnormal noises during use, it is possible that they are installed too tightly or there is an issue with the position and angle of the wiper arms. In this case, it is necessary to go to a professional store for adjustment.

如果雨刮片膠皮表面出現嚴重損壞老化，甚至開裂等情況，這時候必須更換雨刮片。

If the surface of the wiper blade rubber is severely damaged, aged, or even cracked, it is necessary to replace the wiper blade at this time.

如果外觀沒有問題，但是雨刮片的上下總有一些部位刮不到，這時需要檢查是不是雨刮已經變形，上下端翹起來，不能完全貼合在玻璃上，如果變形嚴重則需要更換。

If there is no problem with the appearance, but there are always some parts of the wiper blade that cannot be scraped, it is necessary to check if the wiper has deformed, the upper and lower ends are warped, and cannot fully fit on the glass. If the deformation is severe, it needs to be replaced.

當然如果以上三點都不屬于，那我們就確定為雨刮片可能由于腐蝕老化造成工作效果退化，雖然可以正常使用，但是清潔效果已經大打折扣。我們也通過這幾點來尋找符合要求的測試車輛。

Of course, if none of the above three points belong, then we determine that the wiper blades may have degraded their working performance due to corrosion and aging. Although they can be used normally, their cleaning effect has been greatly reduced. We also use these points to find test vehicles that meet the requirements.

2：確定測試車輛

2: Determine test vehicle

首先我們從同事中搜集了幾臺反應雨刮片不好用的車，通過實驗發現這些車多多少少都遇到了一些雨刮片的問題。

Firstly, we collected several cars from our colleagues who reported that the wiper blades were not working properly. Through experiments, we found that these cars encountered some problems with the wiper blades to some extent.

通過觀察測試車輛的現象，其中一臺雨刮的工作效果確實不太好，雖然沒有異響和明顯的變形和老化，但是刮完后玻璃上會殘留比較明顯的印記，符合我們的測試要求，今天的測試就從它開始。

By observing the phenomenon of the test vehicle, it was found that one of the wipers did not work well. Although there were no abnormal noises, obvious deformation or aging, there were still obvious marks on the glass after scraping, which met our testing requirements. Today's test will start from it.

3：購買工具

3: Purchase Tools

其實這個小竅門需要用到的工具非常簡單，清水一瓶，砂紙一張。這里需要說一句，市面上砂紙分為很多種，粗細程度也不一樣，這里建議用細砂紙進行雨刮翻新，避免粗砂紙對表層傷害過度，反而會影響雨刮片的使用。

In fact, the tools required for this tip are very simple, one bottle of water and one piece of sandpaper. It should be noted that there are many types of sandpaper available on the market, with varying degrees of thickness. It is recommended to use fine sandpaper for wiper refurbishment to avoid excessive damage to the surface caused by coarse sandpaper, which can actually affect the use of wiper blades.

本文由濟南哪里有寶馬汽車維修的為您提供，我們的網站是:http://www.liangshuijing.cn將以全心全意的熱情為您提供服務，歡迎您的訪問！

This article is provided by a BMW repair company in Jinan. Our website is: http://www.liangshuijing.cn We will provide you with wholehearted enthusiasm and welcome your visit!