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Claudia mark this message contains true information
originally written by Claudia
暖暖包接觸空氣才發熱,不用時用一張衛生紙包住暖暖包,放進夾鏈袋一起密封,能延緩發熱速度,暖暖包還可使用好幾天。

References

https://www.mirrormedia.mg/story/20260111edi016

暖暖包用一天變硬就丟?達人曝「1妙招」隔天繼續熱 網實測驚呆:真的能用好幾天 - 鏡週刊 Mirror Media

天氣冷到受不了,暖暖包就是不可或缺的必備小物,但往往用了一天就會變硬。有網友分享妙招,只要不用時,先以乾燥的衛生紙包覆放入夾鏈袋,隔天仍能再次發熱繼續使用,甚至保存得當,可以分成好幾天使用。貼文引發熱議,一票人測試過後也覺得神奇,直呼「謝謝省錢超人」、「好神!真的可以用欸!」

https://www.mirrormedia.mg/story/20260111edi016

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