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    First of all, try to clean its body with toothpaste, and be gentle, provided that the phone case is yellowed because the skin is not clean. Squeeze toothpaste on the surface of the shell, apply it by hand to clean the surface of the phone shell. There is some dirt that can be rubbed with the iron wire we use for dishwashing.

    Although the phone case is still a little yellow after rubbing, the grease stains on it have been cleaned, indicating that the yellowing is due to oxidation.

    If you don’t have the above, you can also use soap instead of toothpaste and alcohol instead of rubber. Soap can just remove grease.

    If you stain the phone case because of coffee, tea, cocoa and other beverages, you can also use bleach to clean it, but the bleach has a chemical smell. If you use bleach, you can ventilate the phone case.

    After the above steps, although the phone case is cleaner, it is still a retro style. You can't just clean it, but don't use disinfectant or other cleaning, you can't use the corrosive ones.

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