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If the plastic ear case is too tight to easily take out, you can try the following methods:
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Use a small tool: Use a small tool, such as a toothpick, needle, small screwdriver, etc., to carefully insert it into the gap between the ear housing and the headset, gently loosen it, and try to release the tightness of the housing.
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Use a lubricant: Drop a small amount of lubricant (such as cooking oil or lubricating oil) into the gap between the earphone housing and the earphone, then wait for some time for the lubricant to take effect.
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Then, try gently taking out the ear case again.
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Use hot water to soak: Soak the ear casing in warm water, or use a hot towel to wrap the ear casing to soften the plastic.
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Then, try gently taking out the ear case again.
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Remember to use caution when trying the above methods to avoid damaging the ear case or the headset itself.