How to Clean the Mik on Xiaomi Phone at Home: Safe Techniques

The microphone in Xiaomi is a small but critical element that affects the quality of calls, voice recordings and voice assistants. Over time, it gets clogged with dust, pothole deposits or even moisture, leading to wheezing in conversation, turning down the volume or completely losing sound. Many users mistakenly think that you need to disassemble the phone or contact a service center to clean up, but in fact, most contaminants can be eliminated on their own in 10-15 minutes without risking damage to the device.

In this article, we will discuss 5 proven ways to clean the microphone on Xiaomi smartphones (including the Redmi Note 10/11/12, POCO X3/X4, Mi 11/12 and others), and how to determine that the problem is in the microphone, not in the software failure. All methods are safe, do not require special tools and are suitable even for beginners.

Signs of a Contaminated Microphone: How to Tell if You Need to Clean It

Before you start cleaning, make sure the problem is really related to physical contamination of the microphone, not software settings or damage to the plume.

• 🔊 The interviewee is not hearing you well — the voice is muffled, disturbed, or interrupted.
• 🎤 Voice messages are recorded with noise – wheezing, crackling or hissing are heard in the background.
• 📱 Voice assistant doesn't recognize commands -- Google Assistant or Alice is constantly asked to repeat a phrase.
• 💧 The microphone stopped working after moisture hit — even if the phone didn't sink, condensation or high humidity could settle on the membrane.
• 🌫️ Visible contamination in the microphone opening – in bright light, dust, fibers, or greasy spots are visible.

If any of these signs are present, the microphone will probably need cleaning, but before you start to use the tools, do a quick diagnosis:

1. Try calling from another device and check how you can be heard.
2. Record a voice message on WhatsApp or Telegram and listen to it.
3. Use a microphone testing app (e.g., Microphone Test from Google Play).

⚠️ Warning: If the microphone doesn't work at all (not even noise), the problem may be a disconnected plume or a damaged controller, in which case cleaning won't help - service repairs are needed.

Where is the microphone on Xiaomi phones: layout schemes

Xiaomi smartphones usually have 2-3 microphones (depending on the model): the main one, the additional one for noise cancellation and sometimes the third one for recording stereo sound.

• 📍 The main microphone is most often located in the bottom of the body (near the USB-C connector or speaker) and on some models (Redmi Note 10 Pro, POCO F3) it is hidden under a decorative grille.
• 📍 An additional microphone, usually located at the top (near the front camera or the speaker of the conversation), is responsible for noise cancellation during calls.
• 📍 A third microphone (if any) may be on the back (e.g., Xiaomi 12 Pro for recording stereo video).

To find the microphone on your model accurately, look in bright light — microphone holes are usually smaller than those for speakers, and are round or slit-shaped. On some devices (POCO F4 GT, Black Shark) microphones can be hidden under removable plugs.

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If you're not sure where the microphone is, turn on the voice recording and then turn your finger over the holes, and when the sound is quieter, you've found the right place.

Preparation for cleaning: what you will need and precautions

To clean the microphone safely on Xiaomi, you don't need professional tools -- there's enough tools at hand -- but it's important to use the right materials to keep the membrane or the case intact.

• 🧴 Isopropyl alcohol (70% or higher) - for disinfection and removal of fatty stains. Do not use medical alcohol or vodka!
• 🖌️ Soft brush -- a new toothbrush with soft bristles or makeup brush is fine.
• 💨 Compressed air balloon (optional) - for blowing dust from hard-to-reach places.
• 🧻 Cotton swabs - it is better to take with a plastic rod (wooden can leave villi).
• 🔍 A lens or flashlight to better consider the contamination.
• 🧴 Microfiber wipes for final wipe.

⚠️ Warning: Never use for cleaning: 🚫 Needles, toothpicks, metal objects — they can damage the microphone membrane. 🚫 Water or soap solution — moisture can oxidize contacts. 🚫 Acetone, gasoline, solvents — they break down plastic and rubber seals.

Before starting, turn off the phone and remove the SIM- card (if the microphone is near the tray).If you clean after moisture, allow the device to dry for at least 24 hours in a dry place (for example, in rice or silica gel).

Turn off the phone and remove it. SIM-map|Prepare all necessary tools|Examine the microphone for visible contamination|Make sure there are no drafts in the room (dust should not fly)|Wear gloves if you use alcohol-->

Method 1: Dry brush and compressed air cleaning (the safest method)

This method is suitable for removing dust and fine debris without risking damage to the microphone, and is especially effective if the contamination is minor or you are doing a preventive cleaning.

Algorithm of action:

1. Take a soft brush (for example, for watercolor or makeup) and gently swipe it along the microphone hole (without pressing!).
2. If you have a can of compressed air, spray it with short pulses (distance - 5-7 cm).
3. Repeat the procedure 2-3 times, then check the microphone for performance.

This method works well for models with open microphone holes (for example, Redmi 9A or POCO M3). For devices with closed grilles (as in Xiaomi 12S Ultra), a deeper cleaning may be required.

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If you don't have compressed air on hand, you can use a dryer at minimum power (cold mode!). Keep it at a distance of 10-15 cm and blow at an angle so as not to damage the membrane.

Method 2: Wet cleaning with cotton swab and alcohol (for fatty contaminants)

If the microphone is filled with potassium fat deposits or shows sticky spots, dry cleaning will not be enough, in which case the isopropyl alcohol, which dissolves fat and quickly evaporates without leaving traces, will help.

Step-by-step:

1. Moisten the cotton swab in isopropyl alcohol (70% or higher) so that it is wet, but not dripping.
2. Carefully wipe the microphone hole in a circle, without pressing. Avoid getting alcohol inside the case!
3. Let the alcohol evaporate (2-3 minutes), then repeat the procedure with a dry cotton swab to remove the remains of dirt.
4. If the contamination is severe, use a toothpick with coiled cotton wool (not metal part!) soaked in alcohol.

For dual-mic models (such as the Xiaomi 11 Lite NE), treat both holes. After cleaning, let the phone stand for 10-15 minutes in the off state so that the alcohol completely evaporates.

⚠️ Warning: If the microphone gets worse after wet cleaning, the alcohol has hit the membrane, in which case don't turn on the phone for 1-2 hours - let it dry naturally.

Method 3: Removing moisture from the microphone (if the phone is wet)

If the microphone stops working after water, rain or high humidity, it needs not only to be cleaned, but also to be dried, and moisture can stay inside even if the phone is dry on the outside, so you need to act quickly.

What to do:

1. Turn off the phone and remove it. SIM-card and memory card (if any).
2. Wet the visible moisture around the microphone with a microfiber napkin.
3. Put your phone in a dry place with good ventilation. Optimal options: 🌾 Sickle bag (shoe box bags). 🍚 Dry rice (close your phone and rice in a sealed bag for 6-8 hours). 💡 Next to an incandescent lamp (no closer than 30 cm!).

After 6-12 hours, check the microphone. If moisture remains, repeat the drying.

If the microphone still does not work after drying, try blowing it with compressed air (as in Method 1) or contact the service - the contacts may have oxidized.

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Never use a hot air dryer, microwave or oven to dry your microphone! This can melt plastic or damage the chips.

Method 4: Partially disassembled deep cleaning (for power users)

If the surface methods didn't work, and the microphone still doesn't work well, maybe the dirt has accumulated under the protective grille, in which case you'll have to remove the back cover (on the removable models) or gently tuck the grille.

Attention! This is only for users who have had experience disassembling phones, and if you're a beginner, you should contact the service.

How to proceed:

1. Turn off your phone and remove the back cover (if it is removable). For models with adhesive attachment (Xiaomi 12, Redmi Note 11 Pro+), use a plastic shoulder blade and hair dryer to soften the adhesive.
2. Find a microphone – it looks like a small black or metal rectangle with a hole.
3. Carefully place the protective grille (if any) with a plastic card or tweezers. Be careful - it may be glued!
4. Clean the microphone membrane with a dry brush or cotton swab dipped in alcohol. Don't touch the membrane directly!
5. Collect the phone in reverse order, making sure that all latches are in place.

If the microphone still doesn’t work after all the manipulations, the problem may be a hardware failure (a disconnected plume, a damaged membrane), in which case it is better to contact an authorized Xiaomi service center.

Frequent Mistakes When Cleaning the Microphone and How to Avoid Them

Many users make critical mistakes in trying to clean the microphone, which only exacerbate the problem.

Also, you should not clean the microphone often - it is enough to carry out the procedure every 3-6 months or as needed. Excessive cleaning can lead to wear and tear of the protective grille or the villi getting inside.

FAQ: Answers to Frequent Questions About Cleaning the Mic on Xiaomi