Remember to clean the earphones from time to time. Any dirt or other foreign material (for example grease) on the earphones’ charging plate will hinder the earphones from charging when inserted in the capsule.
Buildup of earwax or other foreign material on the mesh net of one or both earphones can result in lower perceived audio or audio imbalance. The mesh nets can be seen clearly when the foam tips are removed. Please clean that part of the earphones thoroughly, so that the mesh nets are see-through.
Clean the earphones by very gently wiping them with a clean damp cloth. Do not immerse the earphones in water or other liquids! Let the earphones dry completely before use.