When an invisible hearing aid isn't working properly, the first step is identifying whether the sound is muffled or completely absent. Muffled audio is often caused by a clogged wax guard or microphone port, both of which can usually be cleaned or replaced at home. Complete silence is more likely due to a dead battery, charging issue, or internal malfunction. If basic troubleshooti... https://cleartonehearingaids.com/hearing-aid-repair/