How to clean the speaker on Xiaomi Redmi Note 9: full instructions with photos and videos

Xiaomi Redmi Note 9 is one of the most popular smartphones in the budget segment, but even he is not immune from the typical problem: over time, the speaker begins to wheez, mute the sound or completely stops working normally. The reason is almost always the same - the accumulation of dust, villi or moisture flows in the speaker grille. In the service center for such a cleaning will take from 800 to 1500 rubles, but you can cope independently - without the risk of damaging the phone, if you know the nuances.

In this article, we will look at 5 proven ways to clean a speaker, from the simplest (with a toothpick) to the most advanced (ultrasonic bath), what tools you will need, how to avoid typical errors and when to contact the service, and also why you can not use cotton swabs and how to properly dry the speaker after moisture.

Why the speaker clogs on the Redmi Note 9: the main reasons

The Redmi Note 9 speaker is located at the top of the screen, under the safety net, and its design offers minimal protection from external influences — it's not IP68, but only IP53 (splash protection, but not immersion protection), as a result of even ordinary use leads to clogging:

• 🌫️ Dust and dirt – gets through microscopic holes in the grille, especially if the phone is often lying down screen or worn in a pocket without a cover.
• 🧵 Villi and threads cling to a net of clothes, bags or sofa covers, especially dangerous if the phone is placed next to wool.
• 💧 Moisture and condensate – even if the phone hasn’t sunk, moisture from the air (such as in the bathroom) can settle on the speaker’s membrane, leaving salt deposits.
• 🍟 Fat and sticky particles – remnants from food, creams or cosmetics that are transferred from your fingers to the screen and get into the speaker.

The first sign of a clogged speaker is a muted or distorted sound during calls, the interlocutor can be heard "through cotton", and sometimes the sound disappears altogether, and if you do not clean the speaker for years, it can lead to a break in the membrane due to constant dirt pressure.

⚠️ Attention: If the speaker is not only wheezing, but has stopped working completely, the problem may be a break in contacts or a failure of the microphone.

Preparation for cleaning: what you need and how not to damage the phone

Before you start cleaning, make sure you have everything you need. Don't use the tools at random, which can make the problem worse. Here's the minimum set of tools:

What you can not do categorically:

• 🚫 Cotton swabs - villi will remain in the dynamics and even more clog it.
• 🚫 Needles or pins – you can puncture a membrane or damage the protective net.
• 🚫 Water or soap solution - moisture will get inside the case and disable other components.
• 🚫 Compressed air (cylinder) – a strong flow can tear the membrane from the fasteners.

If you have never cleaned speakers before, start with the most gentle methods (toothpicking + scotch) and only if they don’t help, move on to the more radical ones (alcohol or ultrasound).

Turn off the phone and get it out. SIM-map

Prepare your workspace (clean desk, good lighting)

Check that all the tools from the table are at hand.

Take a picture of the speaker before cleaning (to compare the result)-->

Method 1: Toothpick cleaning is the easiest and safest method

This method is suitable for removing large debris — villi, dust lumps or dried moisture droplets — the main advantage is that it does not require disassembling the phone and takes literally 5 minutes.

Step-by-step:

1. Turn off the phone and place it on a flat surface with the screen up.
2. Take a plastic or wooden toothpick (not metal!).
3. Carefully swipe the speaker parallel to the screen with a toothpick, slightly pressing, and the movements should be short and directed from center to edge.
4. After 2-3 passes, flip the phone over and slightly tap on the back cover - debris will fall out under the influence of gravity.
5. Repeat the procedure until the toothpick is no longer dirty.

If the garbage is tightly entrenched in the holes, you can slightly moisten the toothpick in isopropyl alcohol (but not in water!).The alcohol will quickly evaporate and do not damage the electronic components.

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To see the results better, point the light of the flashlight at the speaker at an angle, so you can see even small particles of dust.

Method 2: Scotch cleaning – how to remove villi and fine dust

Scotch is great at handling soft debris, such as villi, animal hair or cotton fibers, and is especially effective if the speaker is clogged after contact with clothing or upholstered furniture.

How to clean:

1. Cut a small piece of scotch (with a width of 1-1.5 cm).
2. Fold it with the sticky side outside, "loop."
3. Carefully press the tape to the speaker grille and rip it off abruptly. Repeat it 3-4 times.
4. For best results, use medium-stick tape (paint or stationery) and avoid too sticky options, which can leave traces on plastic.

This method can be combined with a toothpick: first remove large debris, then "clean" with tape.

⚠️ Warning: If you cleaned the tape with the sound worse, some of the glue has gone inside the speaker, in which case, wipe the grille with a cotton disc soaked in isopropyl alcohol.

Method 3: Wet cleaning with alcohol - how to remove fat and sticky deposits

If the speaker is not only clogged, but also covered with a sticky coating (for example, from hand cream or food), you will need a deep cleaning, here will help isopropyl alcohol — it dissolves fat and quickly evaporates, leaving no divorces.

Algorithm of action:

1. Moisten a cotton cotton cotton disc or soft tissue (microfibre) in isopropyl alcohol. It should be wet, but not wet.
2. Gently wipe the speaker grille, avoiding fluid entering the holes. Movements in a circle, from center to edge.
3. Allow the alcohol to completely evaporate (2-3 minutes).
4. If the dirt remains, repeat the procedure, but do not press too hard - you can damage the protective net.

For hard-to-reach areas, you can use a cotton swab dipped in alcohol, but only if it is tightly twisted (without sticking villi). The alternative is a soft-bristled toothbrush dipped in alcohol.

Method 4: Advanced cleaning – ultrasonic bath (for experienced)

If the Redmi Note 9 speaker is so clogged that previous methods did not help, you can try ultrasonic cleaning, which is used in service centers, but it can be repeated at home if you have an ultrasonic bath (costs from 1500 rubles).

Important: it's only suitable for collapsible speakers, and if you're not sure about your skills, you'd better see a specialist.

Step-by-step:

1. Take the phone apart (experience required!) and remove the speaker. In the Redmi Note 9, it is mounted on the latches and the plume.
2. Place the speaker in an ultrasonic bath with distilled water or alcohol.
3. Set the temperature not above 40 ° C and the time is 2-3 minutes.
4. After cleaning, dry the speaker with cold air from the hair dryer (at least 10 minutes).
5. Get your phone together and check the sound.

⚠️ Attention: Ultrasound can damage the membrane if it's already worn out, and if you have a crunch or rattle after cleaning, you'll have to replace the speaker.

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Ultrasonic cleaning is a last resort, and 90 percent of the time, it's enough to clean a toothpick and alcohol.

Method 5: Software Diagnostics - How to Check the Speaker After Cleaning

After cleaning, it is important to make sure that the speaker is working correctly, and you can use built-in tests or third-party applications to do this.

Method 1: Testing through the Engineering Menu

1. Open the Phone app and dial ##4636##.
2. Select the Hardware Testing option → Audio.
3. Press Speaker Test and listen to the sound. It should be clean, without wheezing.

Method 2: Phone Doctor Plus (Free on Google Play)

• Download and install the app.
• Run the Speaker test.
• If the sound is distorted, repeat the cleaning or check the sound settings on the phone.

If the sound is bad after all the manipulations, the problem may be:

• 🔊 Damaged membrane (requires a speaker replacement).
• 📶 Faulty plume (needs diagnosis in the service).
• 🔧 Software failure (will help reset settings).

Frequent Mistakes and How to Avoid Them

Even with a careful cleaning, you can make mistakes that will make things worse.-5 Failures and How to Prevent Them:

1. Pressing the bar too hard. → It can bend the safety net or damage the membrane. Solution: use minimal force.

If you doubt your abilities, it is better to contact the service. The average cost of cleaning a speaker in Xiaomi centers is about 1000 rubles, which is cheaper than repairing after a failed independent attempt.

FAQ: Answers to Frequent Questions