Earwax and hearing aids: blockage, whistling and ear checks

How can earwax affect hearing aids?

Earwax is normal and protects the ear canal. A problem arises when enough wax collects to reduce hearing, cause other symptoms, block examination or prevent an accurate ear impression. People who use hearing aids may be more prone to build-up because an earpiece or mould sits in the canal and can interfere with the ear’s natural movement of wax.

Wax can affect the system in two places. It can block the ear canal itself, reducing the sound that reaches the eardrum, and it can collect in the hearing-aid dome, mould, filter or tubing. Either can make the aid seem weak or inconsistent.

Signs that wax may be affecting a hearing aid

You may notice one or more of the following:

• sound is quieter or more muffled than usual;
• the hearing aid starts whistling or producing feedback;
• the earpiece, wax guard, mould or tubing repeatedly becomes blocked;
• the ear feels full, itchy or uncomfortable;
• the aid no longer seems to fit or sound as it normally does; or
• tinnitus becomes more noticeable alongside a blocked sensation.

Whistling does not automatically mean wax. Feedback can also happen when an earmould is loose, damaged or inserted incorrectly, when tubing is split, or when sound leaks back towards the microphone.

What should you check before assuming it is earwax?

Follow the care instructions for your particular hearing aid. If you are comfortable doing so, work through the basic checks provided by your audiology service or manufacturer:

1. Confirm the aid is switched on and the battery or charge is adequate.
2. Check that the earpiece is inserted correctly.
3. Inspect the wax guard, dome, mould and tubing for visible blockage or moisture.
4. Look for split, hardened or loose tubing and damage to the earpiece.
5. Restart the device if that is part of its normal troubleshooting process.

Clean only the parts you have been shown how to clean. Do not push a cleaning tool, cotton bud or the hearing aid itself deeper into the ear canal to try to reach wax.

When can an ear examination help?

An ear check is useful when blocked-ear symptoms accompany the hearing-aid problem, when basic device checks do not help, or when your audiology service has asked you to have wax assessed. The clinician should ask about symptoms and ear history, then look in both ears.

If wax is present and removal is appropriate, the available options can include microsuction, electronic irrigation or manual removal by a trained practitioner. The method depends on the ear, the wax, relevant contraindications and the service.

If the canal is clear, further wax treatment is not the answer. The next step may be a hearing-aid repair, an audiology review or medical assessment, depending on the symptoms.

Should ears be checked before a hearing test or new earmould?

Significant wax can prevent a full ear examination, affect testing or stop an accurate impression of the ear canal being taken. NICE’s adult earwax quality standard includes removal when wax is blocking examination or an ear-canal impression—not only when it is causing symptoms.

If you know you are prone to build-up, check the instructions in your audiology appointment letter. Arrange an ear check with enough time to follow any preparation advice and resolve difficult wax without rushing immediately before the hearing appointment.

How can hearing-aid users manage repeated wax build-up?

You cannot and should not stop the ear producing wax. The practical aim is to notice problems early and avoid actions that push wax deeper or injure the canal.

• Follow the cleaning and wax-filter schedule for your specific hearing aid.
• Keep routine audiology maintenance appointments.
• Do not insert cotton buds, fingers or improvised tools into the canal.
• Ask a pharmacist or clinician about softeners rather than self-treating blindly.
• Seek advice before using drops if you may have a perforation or relevant ear history.
• Arrange a check when familiar blocked-ear or feedback symptoms return.

Will removing wax restore the hearing aid to normal?

It may help when wax is the main cause, but removal cannot repair a blocked filter, damaged tubing, poor earmould fit or changed hearing. Recheck the aid after the ear appointment. If sound remains weak, distorted or uncomfortable, contact your audiology or hearing-aid service.