Free Guide to Hearing Aid Care and Maintenance

Understanding Your Hearing Aid Components and How They Work

Hearing aids are small electronic devices that contain several working parts, each with a specific job. Understanding what each piece does helps you care for your device properly. The microphone picks up sound from your environment and converts it into electrical signals. The amplifier makes these signals stronger so you can hear them better. The receiver (also called a speaker) sends the amplified sound into your ear canal. The battery provides power to all these parts. The casing holds everything together and protects the internal components.

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Modern hearing aids also contain a computer chip that processes sound in real time. This chip can adjust volume automatically, filter out background noise, and switch between different listening programs. Some hearing aids have wireless technology that lets them connect to smartphones, televisions, and other devices. Behind-the-ear (BTE) models have a curved case that sits behind your ear with a thin tube delivering sound into the ear canal. In-the-ear (ITE) models fit partly or completely inside the ear canal. Receiver-in-canal (RIC) models have the speaker in the ear canal rather than in the case behind the ear.

The battery is one of the most important components to understand because it requires regular replacement. Most hearing aids use disposable zinc-air batteries in sizes 10, 312, 13, or 675. When you remove the colored sticker on the battery, it activates the zinc-air chemistry inside. Some newer hearing aids use rechargeable lithium-ion batteries similar to smartphone batteries. These devices need to be placed in a charging case overnight, similar to charging your phone. Knowing your battery type helps you purchase the correct replacements and understand your device's power requirements.

Practical takeaway: Identify which type of hearing aid you have and locate the battery compartment. Write down your battery size (10, 312, 13, or 675) or confirm that your device is rechargeable. Keep this information with your hearing aid accessories so you always know what supplies you need.

Daily Cleaning Routines to Keep Your Hearing Aids Working Well

Hearing aids spend all day in your ear canal, which produces earwax, moisture, and natural oils. These substances can accumulate on your device and damage the microphone, speaker, and battery contacts. Daily cleaning prevents buildup and extends your hearing aid's lifespan. The best time to clean your hearing aids is at night before you remove them for the day. This gives you time to do the job carefully without rushing.

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Start by using a soft, dry cloth—like a microfiber cloth designed for eyeglasses—to wipe down the outside of your hearing aid. Gently rub the entire surface, paying special attention to the areas where earwax typically collects. If your hearing aid has a wax guard (a small filter that catches earwax before it enters the device), check it during this daily cleaning. Many wax guards are replaceable, and you should swap it out when you see visible buildup. Some hearing aids come with a special cleaning tool that has a brush on one end and a picker on the other. Use the brush side to gently clean the microphone openings and the picker to remove debris from small crevices.

Never use water or cleaning solutions on your hearing aids unless specifically directed by your manufacturer. Water can cause corrosion and electrical damage. Some people keep a small container of uncooked rice or silica gel packets near where they store their hearing aids at night. Placing your devices in this container for a few hours helps absorb any moisture that accumulated during the day. If your hearing aid is rechargeable, make sure the charging contacts are dry and clean before placing it in the charger. Wipe these metal contacts with a dry cloth if they appear wet or dirty.

Pay attention to the battery compartment area, as it's prone to corrosion from moisture and earwax. If you notice any discoloration on the battery contacts or inside the compartment, gently clean these areas with a dry cloth or the picker end of your cleaning tool. Never insert anything sharp or rigid into these spaces, as you could damage the contacts or internal wiring. If you notice persistent moisture problems despite daily cleaning, you may need to use a dehumidifier specifically designed for hearing aids, which are inexpensive devices that remove moisture overnight.

Practical takeaway: Create a nightly routine: remove your hearing aids, wipe them with a soft cloth, check and replace the wax guard if needed, and store them in a dry location. Set a phone reminder at the same time each evening until this becomes automatic. Keep your cleaning supplies (soft cloth, cleaning tool, and replacement wax guards) in one designated spot so you're never searching for them.

Managing Moisture and Preventing Water Damage

Moisture is one of the biggest threats to hearing aid longevity. Your ear canal naturally produces moisture and earwax, and this moisture can seep into your hearing aid even with daily cleaning. Sweat during exercise, humidity in your environment, and water from showers or swimming can all damage the internal electronics. Understanding how to manage moisture will help you avoid expensive repairs and premature device failure.

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The best strategy is prevention through awareness of your environment and activities. If you exercise regularly or live in a humid climate, you may need to be more aggressive with moisture management than someone in a dry climate. During high-humidity months, consider using a hearing aid dehumidifier every night. These devices come in different styles: some use electricity and heat to dry your aids, while others use replaceable silica gel canisters that absorb moisture passively. The electric models are more effective but cost more initially. The silica gel models are inexpensive but require you to replace the gel regularly once it becomes saturated (indicated by a color change in the gel).

Never wear your hearing aids while showering, swimming, or bathing. Even waterproof hearing aids have limits to their water resistance. Waterproof ratings tell you how much water exposure the device can tolerate, but "water-resistant" does not mean "waterproof." If you accidentally get your hearing aid wet, remove it immediately and place it in a dehumidifier or container of uncooked rice for at least 24 hours before trying to use it again. Do not attempt to use it while wet or place it in a charger while damp, as this could cause electrical damage.

Some hearing aids have moisture indicators inside the battery compartment. These indicators appear as a small dot that changes color when exposed to moisture. If you see that your indicator has changed color, this tells you that moisture has entered the device. Contact your hearing aid provider about whether the device can be saved or if replacement is necessary. Preventing moisture damage is much less expensive than repairing or replacing a device, so investing in a dehumidifier or silica gel canisters is a smart financial decision if you're prone to moisture problems.

Practical takeaway: Assess your moisture exposure: Do you exercise, live in a humid climate, or spend time in damp environments? If yes to any of these, invest in a hearing aid dehumidifier and use it every night. Purchase replacement silica gel or replacement batteries for your electric dehumidifier before you need them so you're prepared for regular maintenance.

Battery Care, Replacement, and Storage

Whether you have disposable or rechargeable batteries, proper battery care extends both battery life and overall hearing aid function. Disposable zinc-air batteries have specific handling requirements that most people don't realize. Once you remove the colored sticker on the back of the battery, the zinc-air chemical reaction begins. You shouldn't remove the sticker until you're actually ready to use the battery. If you peel off the sticker and then don't use the battery for days, it will lose power even sitting in your home.

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Always keep your spare batteries in their original packaging until you're ready to use them. Store them at room temperature in a dry location. Never store batteries in your car, bathroom, or any place with temperature extremes or high humidity. Extreme heat can reduce battery life, and moisture can damage the chemical materials inside. When you insert a new battery into your hearing aid, wait about one minute after peeling off the sticker before closing the battery compartment. This allows air to fully activate the chemical reaction and ensures the battery works at full capacity from the start.

If you use rechargeable hearing aids, follow the manufacturer's instructions for charging times and frequency. Most modern lithium-ion batteries don't have memory effects like older batteries did, so you can charge your device every night without worrying about reducing its long-term capacity. However, leaving rechargeable devices plugged in for days or weeks without use can sometimes cause problems. If you won't