Car taillight shades can be blurred for a variety of reasons, mainly two reasons always contribute to it. If it is an external cause, just clean it with glass water or a degreaser. If it's an internal cause, you'll need to pay more attention to it.

Measures (caused by internal problems)

Look for cracks in the headlights that could allow moisture to get in. If there is moisture, it means that the light got in during assembly. Although cleaning the exterior of the taillights does little to improve the appearance and brightness of the lights.

Measures

Clean the plastic lens inside the taillight, dry it and seal it, so as to prevent moisture from entering the inside of the taillight again. Drill a small hole in the bottom of the headlight, but do not drill a hole in glass headlights or closed-beam headlights. Seal with a rubber stopper or silicone sealant after draining and drying.

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