How often you should change wax filters, domes & batteries

How often should you change wax filters, domes and batteries?

Small hearing aid parts do not last forever. Wax filters, domes, batteries and thin tubes are all parts that may need regular replacement to keep your hearing aids comfortable, clean and working as they should.

How often you need to replace them depends on your hearing aid model, how much you wear your hearing aids, how much earwax you produce and how well the devices are cleaned. This guide gives you a practical replacement schedule, so you know what to check and when.

A practical replacement schedule for hearing aid users

There is no single schedule that fits everyone. Some users need to change wax filters more often because they produce more earwax. Others may use domes for longer if they stay clean and secure. The most important thing is to check these small parts regularly and replace them before they affect sound, comfort or hygiene.

Quick overview

Wax filters: often every 2–4 weeks, or sooner if the sound becomes weak or blocked.
Domes: often every 1–3 months, or sooner if they are dirty, stiff, damaged or loose.
Disposable batteries: usually every few days to around two weeks, depending on battery size, hearing aid use and streaming.
Thin tubes: often every 3–6 months, or sooner if they become stiff, discoloured, blocked or damaged.
Cleaning products: use regularly as part of your daily or weekly hearing aid care routine.

Wax filters: when should you change them?

Wax filters, also called wax guards or earwax filters, help protect the receiver or sound outlet from earwax. Earwax is one of the most common reasons why a hearing aid suddenly sounds weak, muffled or stops working properly.

As a practical rule, many users change wax filters every 2–4 weeks. However, you may need to change them more often if you produce a lot of earwax, wear your hearing aids many hours a day or notice that the sound becomes unclear.

Signs that your wax filter should be changed

The hearing aid sounds weak or muffled.
The sound disappears completely, even though the hearing aid is turned on.
You have already changed the battery or charged the hearing aid.
You can see wax or dirt around the sound outlet.
Cleaning the dome or receiver does not improve the sound.

Always use the same type of wax filter as the one made for your hearing aid. Wax filters are not universal, and the wrong filter may not fit correctly.

Find wax filters for hearing aids

Domes: when should you change them?

Domes are the small soft tips that sit in the ear canal. They help keep the receiver or thin tube in place and guide sound into the ear. Because domes sit directly in the ear, they are exposed to earwax, skin oils and daily wear.

As a practical rule, domes are often replaced every 1–3 months. You should replace them sooner if they become dirty, hard, cracked, loose or uncomfortable.

Signs that your domes should be changed

The dome looks dirty and cannot be cleaned properly.
The dome feels stiff, dry or uncomfortable.
The dome is torn, cracked or damaged.
The dome no longer sits securely on the receiver or tube.
The hearing aid feels loose or the sound has changed.

Domes come in different shapes and sizes, such as open domes, closed domes and power domes. Always choose the same dome type and size unless your hearing care professional has recommended a different fitting.

Find hearing aid domes

Batteries: when should you change them?

If your hearing aids use disposable batteries, the replacement interval depends on the battery size, the hearing aid model, how many hours you wear your hearing aids and whether you stream sound from your phone, TV or other devices.

Smaller batteries usually last fewer days than larger batteries. Streaming, high power settings and long daily use can also make batteries run out faster. Many hearing aids give a low-battery warning when it is time to change them.

Typical disposable battery sizes

Size 10: small batteries, often used in smaller hearing aids.
Size 312: common in many modern hearing aids.
Size 13: often used in larger or more powerful hearing aids.
Size 675: often used in larger power hearing aids.

Signs that your battery should be changed

The hearing aid gives a low-battery warning.
The sound cuts in and out.
The hearing aid stops working during the day.
The sound becomes weak or unstable.
The battery has been in use for several days and performance has dropped.

Keep spare batteries with you, especially if you are travelling, attending meetings or relying on your hearing aids for a full day. If you use rechargeable hearing aids, make sure they are placed correctly in the charger every night.

Find hearing aid batteries

Thin tubes: when should you change them?

Thin tubes are small hollow tubes used on many open-fit behind-the-ear hearing aids. They guide sound from the hearing aid into the ear. Thin tubes do not contain a speaker, which makes them different from receivers.

Thin tubes may need replacing every 3–6 months, depending on use and care. They should be changed sooner if they become stiff, yellow, cracked, blocked or no longer sit comfortably.

What should you check first if the sound is weak?

If your hearing aid suddenly sounds weak, blocked or unclear, it does not always mean the hearing aid is broken. In many cases, the issue is caused by a small replaceable part.

Try this checklist

Check whether the battery needs replacing or the hearing aid needs charging.
Check whether the dome is blocked with wax or dirt.
Replace the wax filter if the sound is weak or blocked.
Clean the outer parts of the hearing aid carefully.
Check whether the thin tube or receiver is damaged or blocked.
Contact your hearing care professional if the sound does not improve.

Why a replacement routine helps

It can be easy to forget small parts until something goes wrong. A simple replacement routine helps you avoid unexpected weak sound, poor fit or discomfort. Many hearing aid users find it helpful to keep spare wax filters, domes and batteries at home, so they can replace parts as soon as they notice a problem.

A good routine does not have to be complicated. Check the hearing aids every morning or evening, clean visible dirt, and replace small parts when they show signs of wear or blockage.

Suggested routine for everyday hearing aid care

Every day

Wipe the hearing aids with a clean, dry cloth or suitable cleaning wipe.
Check the domes for visible wax or dirt.
Open the battery drawer overnight if you use disposable batteries.
Place rechargeable hearing aids correctly in the charger.
Use a drying cup or drying box if moisture is a recurring issue.

Every week

Brush around the microphone openings, dome and receiver area.
Check whether the wax filter is blocked.
Inspect domes and thin tubes for wear, damage or looseness.
Make sure you have spare wax filters, domes and batteries available.

Every month

Replace wax filters if they have not already been changed.
Check whether domes still feel soft, secure and clean.
Check thin tubes for stiffness, blockage or discolouration.
Review whether you are using more batteries than usual.

FAQ: changing wax filters, domes and batteries

How often should I change hearing aid wax filters?

Many users change wax filters every 2–4 weeks, but some need to change them more often. Change the wax filter whenever the sound becomes weak, blocked or muffled.

How often should I change hearing aid domes?

Domes are often replaced every 1–3 months. Replace them sooner if they are dirty, stiff, cracked, loose or uncomfortable.

How often should I change hearing aid batteries?

Disposable hearing aid batteries can last from a few days to around two weeks, depending on battery size, hearing aid use and streaming. Change the battery when you hear a low-battery warning or notice unstable sound.

How often should I change thin tubes?

Thin tubes are often replaced every 3–6 months. Replace them sooner if they are stiff, discoloured, blocked, cracked or no longer fit comfortably.

Should I change both domes at the same time?

It is often practical to change both domes at the same time, especially if they have been used for the same period. However, if only one dome is damaged or dirty, you can replace that one first.

Can I clean a wax filter instead of replacing it?

Wax filters are designed to be replaced. If a wax filter is blocked, it is usually better to replace it with a new one rather than trying to clean it.

Do I need different wax filters for different brands?

Yes. Wax filters are brand- and model-specific. Always choose the wax filter type that matches your hearing aid.

Why does my hearing aid still sound weak after changing the wax filter?

If the sound is still weak, check the dome, thin tube, receiver, battery or microphone openings. If the problem continues, the hearing aid may need professional service.