Why does my hearing aid sound muffled or unclear?

Muffled sound is often caused by earwax or debris blocking the microphone, speaker, or your ear canal. Start by cleaning your hearing aid according to the manufacturer's instructions, paying special attention to the microphone and speaker openings. Check and replace the wax filter if your hearing aid has one. Also, ensure your ear canal isn't blocked with wax. If cleaning doesn't help, the issue might be with internal components or programming, and you should contact your hearing care provider for assistance.