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Factory reset them.
Sorry, there was a problem. Please try again later.We’re here to help you with your JBL Tune 235NC TWS. TWS ear buds, charging issues are frequently caused by foreign matter on the metal charging contacts. This can include sweat, grease, ear wax, etc. Please clean the contact points of your earbuds and the charging case to resolve the issue. For further assistance, please feel free to contact our customer support.
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