Cleaning your hearing aid microphone takes about a minute and requires nothing more than a small brush and the right technique. The key detail most people miss: always hold the hearing aid with the microphone port facing downward while you brush, so loosened debris falls out instead of deeper into the device. Done daily, this simple habit prevents the most common cause of weak or muffled sound.
Where to Find the Microphone Port
Before you can clean the microphone, you need to know where it is. The location depends on what style of hearing aid you wear. On behind-the-ear (BTE) and most receiver-in-canal (RIC) models, the microphone sits on top of the piece that hooks over your ear. Look for one or two tiny openings on the upper surface of the housing. On in-the-ear (ITE) and completely-in-canal models, the microphone port is on the outer faceplate, the part that faces outward when the device is seated in your ear. Some newer canal-worn designs place both the microphone and speaker deep inside the ear canal module, so the port is on the tip that sits furthest inside your ear.
If you’re not sure, check your user manual or look for the smallest pinhole openings on the device. Microphone ports are always much smaller than the speaker opening and are often marked with a tiny dot or icon.
Tools You’ll Need
You don’t need much. Most hearing aid manufacturers include a small cleaning brush with the device, and that’s the primary tool for microphone maintenance. If yours is lost or worn out, here’s what works:
- Hearing aid brush: A soft-bristled brush designed to sweep wax and dust from microphone ports and battery compartments without scratching surfaces. An old, clean, dry toothbrush with soft bristles works in a pinch.
- Wax pick or loop tool: A thin wire loop for dislodging hardened wax from sound openings. Useful when brushing alone doesn’t clear a stubborn blockage.
- Microfiber cloth or alcohol-free wipes: For wiping down the outer casing and removing oils, sweat, and grime from daily handling.
- Multi-tool: Many cleaning kits combine a brush, wax loop, and battery magnet into one pocket-sized tool, which is convenient for travel.
A hearing aid dehumidifier (either an electronic dryer or a simple container with desiccant packets) isn’t a cleaning tool per se, but it protects microphone performance by pulling moisture out of the device overnight. Condensation inside the microphone housing can corrode metal contacts, short out electronics, and physically block the port. Regular dehumidifier use is especially worthwhile if you live in a humid climate or sweat heavily.
Step-by-Step Cleaning Process
Clean your hearing aids in the morning rather than right after removing them at night. Wax and debris that accumulated during the day will have dried overnight, making them easier to brush away.
Start by holding the hearing aid with the microphone port pointing straight down toward a table or your lap. This orientation is critical. Gravity will pull loosened particles out of the port instead of letting them settle deeper into the internal housing. With your brush, gently sweep across and around the microphone opening using short, light strokes. Don’t press the bristles into the port. You’re trying to dislodge surface debris, not push material inside.
If you see a visible speck of hardened wax sitting in or just over the port, carefully use the wax pick to lift it free. Keep the device facing down the entire time. After brushing, wipe the full surface of the hearing aid with a dry microfiber cloth or an alcohol-free wipe to remove skin oils and residue from your fingers.
For ITE or canal-style devices, repeat the same downward-facing technique on the microphone port side. Then flip the device and brush the speaker (receiver) opening the same way, since wax buildup there also affects sound quality. If your hearing aid uses a replaceable wax guard over the speaker, check it while you’re at it and swap in a fresh one if it looks clogged.
What Not to Do
The microphone port leads directly to a fragile electronic component. A few common mistakes can cause permanent damage:
- Water or liquid cleaners: Never rinse, soak, or wipe the microphone port with anything wet. Even a small drop can reach the internal diaphragm and corrode it.
- Compressed air: The blast of pressure can rupture the microphone membrane or force debris further inside.
- Needles, pins, or sharp objects: These can puncture the microphone cover or scratch the port opening, creating new places for wax to accumulate.
- Hairspray, lotions, or sprays: Apply hair products and skincare before putting your hearing aids in. Chemical residue coats the microphone opening and hardens into a film that blocks sound.
Avoid setting your hearing aids on bathroom or kitchen counters where moisture, steam, and splashes are common. Store them in their case or dehumidifier when not in use.
Signs Your Microphone Needs Attention
A clogged microphone doesn’t always go silent all at once. More often the sound quality degrades gradually, which makes it easy to blame your hearing rather than the device. Watch for these signs:
Weak or muffled sound is the most common symptom. If your hearing aid seems quieter than usual or voices sound like they’re coming through a pillow, the microphone port is the first thing to check. Johns Hopkins Medicine identifies wax and debris blockage as the single most common reason a hearing aid sounds weak or dead. Static, crackling, or distortion can point to moisture inside the microphone housing. Unexpected whistling or feedback sometimes occurs when a partial blockage changes how sound enters the device, though feedback can also mean the hearing aid isn’t seated properly in your ear.
If cleaning the microphone port doesn’t resolve the issue, try replacing the wax guard (if your model uses one). Still no improvement? The microphone filter or the microphone itself may need professional replacement.
Microphone Filters and When to Replace Them
Many hearing aids have a tiny mesh filter or screen covering the microphone port. This filter catches wax and dust before it reaches the microphone element. Over time, the filter itself gets clogged, and no amount of brushing will fully restore it. At that point, you need to swap in a new one.
Replacement is straightforward. Your audiologist will typically provide the correct filter type and a small applicator tool. You press the tool onto the old filter to pull it out, then flip the tool and press the fresh filter into the port. The exact interval depends on your wax production, your environment, and your specific hearing aid model. Check your user manual for the manufacturer’s recommendation, and ask your audiologist to demonstrate the swap at your next visit so you feel confident doing it at home.
How Often to Clean
Brush the microphone port and wipe down the hearing aid every day. This takes under a minute and prevents the kind of gradual buildup that degrades performance. A quick visual check of the microphone opening each morning, before you put the devices in, catches blockages early.
Beyond your daily routine, professional deep cleaning by an audiologist once or twice a year keeps the internal components in good shape. Audiologists have vacuum tools and ultrasonic cleaners that reach areas you can’t safely access at home. They can also inspect the microphone’s electrical performance and replace worn filters or covers before they cause problems. If you notice persistent sound issues that daily cleaning doesn’t fix, that’s a good reason to move up your next appointment rather than trying more aggressive cleaning on your own.