How to Clean the Speaker on Xiaomi Mi 9T: Safe methods and errors

Xiaomi Mi 9T — It's a popular smartphone with a retractable front camera and stereo speakers that get clogged with dust, villi and dirt particles over time. Contamination of speakers causes sound distortion, volume reduction or the complete disappearance of basses. IP68, Mi 9T It has only partial protection against splashes, so speakers require regular cleaning.

In this article – proven ways to clean the speakers Xiaomi Mi 9T (including the Mi models 9T Pro and Redmi. K20), We'll look at the mechanical and software methods, and we'll explain why some "people's" advice (such as mouth blowing) can make the problem worse.

Signs of pollution of speakers: when you need to clean

Mi speakers 9T They get clogged gradually, and users often attribute the deterioration to "there they are:

• 🔊 Muffled sound – bass frequencies disappear, the voice of the interlocutor in the calls sounds “from the barrel».
• 🎵 Distortions at high volume – wheezing, crackling, or “gurgling” when playing music.
• 📱 Vibration of the body - when playing sound, the smartphone vibrates stronger than usual (dust blocks the membrane).
• 👁️ Visible pollution - under the light of a flashlight in the speaker grid, clusters of dust or villi are noticeable.

If the sound is gone completely, the problem may not be contamination, but detachment of the speaker contacts or damage to the plume, in which case cleaning will not help, you need a diagnosis in the service center, and you should also distinguish pollution from software failures: Before cleaning, check the sound settings in Settings → Sound and vibration and reboot your smartphone.

Anatomy of Xiaomi Mi speakers 9T: what can and cannot be touched

In Mi 9T Two speakers are installed: the lower one (main, next to the connector). USB-C) and the top (spoken, above the screen) both protected by a metal mesh with microholes (cell size) ~0.1 mm), which transmits sound but traps large particles, but over time, the dust penetrates deeper, settling on a membrane, a thin film that vibrates to reproduce sound.

Critical elements that should NOT be damaged in any case:

The top speaker is harder to clean because of the camera's retractable mechanism, and if you're not sure about your skills, just clean the bottom speaker, which gets dirty faster and is easier to mechanically clean.

⚠️ Warning: If the sound gets worse after cleaning (metal ringing or whistling), you've probably damaged the membrane. Stop the manipulation immediately and contact the service.

Method 1: Dry brushing or soft brushing

The safest method that is suitable for regular prevention is:

• 🖌️ Soft brush with natural pile (for example, for watercolor or makeup).
• 🔦 Flashlight (you can use a smartphone flashlight).
• 🧲 Magnetic holder (optional, for convenience).

Step-by-step:

1. Turn off your smartphone and remove it. SIM-card/memory card (if any).
2. Hold the flashlight at an angle to the speaker - so you can see the pollution better.
3. Carefully swipe the brush along the holes (not across!) and the movements should be light, without pressure.
4. For hard-to-reach places, use a dry cotton swab slightly soaked in distilled water (not alcohol!).
5. Blow the speaker with dry air (you can use a can of compressed air for the technique, keeping it at a distance of 10 cm).

Is the smartphone off?

Do you use a soft-pile brush?

Movement along the holes of the grid (not across)?

Do you use liquids (except distilled water)?

Are you blowing the speaker at a safe distance?

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This method removes up to 70% of surface dust, but it will not cope with deep contaminants. For better effect, combine it with method 2 (scotch).

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If you don't have a brush, you can use a new toothbrush with very soft bristles, rinse it in soapy water and dry it thoroughly.

Method 2: Cleaning with sticky tape (scotch)

The method is effective for removing villi, hairs and large particles that are stuck in the grid, suitable only for the lower speaker - the upper one is too small for safe operation.

What you need:

• 📦 Scotch or paint tape (1-1.5 cm wide) Do not use stationery tape - it is too sticky!
• ✂️ Tape-cutting scissors.
• 🔍 Lupa (optional, for accuracy).

How to clean:

1. Cut off a piece of tape long ~3 see fold it sticky side out, "loop».
2. Carefully press the loop to the speaker grid (do not press!).
3. Remove the tape parallel to the surface (not up!). Repeat 2-3 times.
4. Check the result with a flashlight – if the villi are left, use a new piece of tape.

⚠️ Attention: If the sound is quieter after you've cleaned the tape, you've probably hit the membrane with a sticky layer.

This method removes up to 80% of visible contaminants, but does not cope with the dust inside the enclosure. For deep cleaning, use method 3 (ultrasound) or method 4 (special liquids).

Method 3: Ultrasonic cleaning (for power users)

An ultrasonic bath removes deep dust and oxides from the membrane, but it requires caution.

• 🔧 You've tried a brush and scotch before, but the sound hasn't improved.
• 💧 You have access to an ultrasonic bath (for example, to clean jewelry).
• 🛠️ You are ready to disassemble the smartphone (or take the speaker to the service for cleaning).

Step-by-step:

1. Remove the speaker from the body (requires disassembly of the smartphone). T3 and T5. Hazel-softening.

distilled

35-40 kHz

24 hours.

Set the speaker back, check the contacts of the plume.

Ultrasound removes up to 95 percent of the contaminants, but it requires disassembly skills, and if you're not sure, take your smartphone to the service and ask them to "clean the speaker with ultrasound: ~500-800 rubles.

Method 4: Liquid cleaning (for persistent contaminants)

If the speaker is full of sticky dirt (for example, after getting sugary drinks), dry methods will not help.

• 🚫 Prohibited use: alcohol, acetone, gasoline, WD-40.
• ✅ Allowed: Distilled water, special cleaners for electronics (for example, Contact Cleaner), Isopropyl alcohol (concentration not higher than 70%).

Instructions:

1. Turn off your smartphone and remove the battery (if possible).
2. Apply 1-2 drops of liquid to a cotton swab (not on the speaker!).
3. Gently wipe the speaker grid with circular movements without pressing.
4. After 5 minutes, blow the speaker with compressed air (a balloon or a dryer in cold mode).
5. Leave your smartphone to dry for 12-24 hours in a warm place.

⚠️ Attention: If after liquid cleaning the speaker started to "crunch", you overdo it with moisture. Immediately place the smartphone in a bag with silica gel for 48 hours. If the crunch is not gone - the membrane is deformed, you need to replace the speaker.

This is a risky method, but sometimes it's the only way to get sound back when you get liquid, and if you're not sure, go to the service.

Method 5: Software cleaning (test and calibration)

If the speakers are clean, but the sound is still bad, the problem may be the software settings or the drivers crash.

• 🔊 Sound balance: go to Settings → Special facilities → Setting up the sound and make sure the balance slider is in the middle.
• 🎛️ Equator: in the Music or Mi Sound app, reset the equalizer settings to the factory.
• 🔄 Resetting settings: in Settings → System system → Resetting settings → Reset your network settings (don’t reset all settings!).

You can also use the test mode to check the speakers:

1. Open the Phone app and dial ##4636##.
2. Select Equipment Testing → Audio.
3. Test both speakers at different frequencies.

If the test shows that the speaker is working, but the sound in the applications is bad, the problem is in the software.

• Update the firmware to the latest version.
• Clear the cache of the Music, YouTube, Calls apps.
• Install an alternative player (for example, VLC poweramp).

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If the sound improved after the software cleaning, the problem was the settings, not the physical contamination. MIUI sound-correct.

What not to do when cleaning the speakers Mi 9T

Some "tips" from the Internet can irrevocably damage the speakers.

Also not worth it:

• 🔌 Clean the speaker when the smartphone is turned on (the risk of short circuit).
• 🧹 Use a vacuum cleaner (too strong traction will damage the membrane).
• 🧴 Apply the liquid directly to the speaker (only on the cotton swab!).

Prevention: How to protect speakers from pollution

To clean the speakers less often Mi 9T, follow simple rules:

• 📱 Use a cover with speaker protection - many cases have special "bortices" around the holes.
• 🚿 Avoid humid environments – don’t put your smartphone in the bathroom, don’t use it in the rain.
• 🧹 Clean your pockets regularly – pile and garbage from your pockets get into the speaker.
• 🔇 Do not put the smartphone down speaker – so dust easier to penetrate inside.
• 🔄 Once a month, blow the speaker with compressed air (a canister for technology).

If you often listen to music at high volume, install bass-restricting apps (like Bass Booster), which cause the membrane to wear out and accumulate dust in the cracks.

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For additional protection, you can put a special protective net on the speaker (sold in smartphone accessories stores), which allows sound to pass, but traps large particles of dust.

FAQ: Frequent questions about cleaning the Xiaomi Mi 9T speakers