How to clean the speaker on Xiaomi Redmi 9A: from dust, dirt and moisture

Speakers in the Xiaomi Redmi 9A lose volume and sound quality over time due to dust, moisture or fine debris. If you notice that during conversations or listening to music, the sound has become muffled, wheezing or disappearing, the problem is likely to lie in the polluted dynamics. Unlike flagship models, the budget Redmi 9A does not have IP68 protection, so its acoustic holes are especially vulnerable.

In this article, we will discuss 5 proven cleaning methods, from simple (using toothpicks and tape) to advanced (ultrasonic bath or disassembly of the case). You will also learn what errors most often cause the speaker to break after cleaning, and how to avoid them. Importantly, the methods are suitable only for the Redmi 9A (model M2006C3LG), since the location of the speakers in other Xiaomi smartphones may differ.

Signs of a contaminated speaker: when it's time to clean

Before you start, make sure that the problem is the pollution, not the software failure or hardware malfunction.

• 🔊 The sound is quieter than before (even at maximum volume).
• 🎵 There were wheezing or distortions when playing music.
• 📞 The interviewer does not hear you during the call (problem with the microphone or lower speaker).
• 💧 After getting moisture, the sound disappears or becomes "bubbling".
• 🕳️ Visible accumulations of dust or debris in speaker holes (can be viewed with a flashlight).

If one of the items matches, it's time to act, but first check if the sound deterioration is related to the settings. Go to Settings → Sound and vibration and make sure that:

• 🔇 Do Not Disturb mode is off.
• 🎧 There are no active Bluetooth devices that can redirect sound.
• 📱 Software updates installed (sometimes sound bugs are fixed in new versions) MIUI).

Method 1: Dry cleaning with toothpick and scotch

This is the safest method for beginners, and it doesn't require disassembling the phone, and it's suitable for removing dust, fine debris and fibers from the acoustic holes.

• 🪥 Wooden toothpick (not metallic!).
• 🎨 Scotch (preferably paint or stationery, 1-2 cm wide).
• 🔦 Lantern (for illumination).

Step-by-step:

1. Turn off your phone to avoid accidental tapping.
2. Bring the flashlight to the speaker (it is located at the bottom of the case, to the right of the USB-C connector).
3. Carefully roll your toothpick over the holes without pressing hard.The movements should be parallel to the body, not deep!
4. Cut a piece of tape 3-4 cm long, fold it with a sticky side outside and lightly press it against the speaker. Repeat 2-3 times.

Turn off the phone.

Remove the cover (if any)

Light the speaker with a flashlight

Use only a wooden toothpick.-->

⚠️ Warning: Do not use needles, pins or sharp-end toothpicks, which can damage the speaker membrane, resulting in irreversible sound loss. If the debris is not removed, proceed to the next method.

This method is 70 to 80 percent effective for surface contaminants, and if the sound hasn't recovered, it's a deeper problem, like moisture inside the body or dried dirt on the membrane.

Method 2: Cleaning with a vacuum cleaner (only at minimum power!)

A vacuum cleaner can pull dust out of the speaker, but only if used correctly, and the mistake most users make is turning on at full power, which causes membrane damage due to too much airflow.

What you need:

• 🪠 Vacuum with power adjustment (or small) USB-keyboard vacuum cleaner).
• 📏 Nozzle with a narrow nozzle (you can use a straw for a cocktail).
• 🧲 Magnet (optional, to hold metal particles).

How to clean:

1. Set a minimum suction power.
2. Bring the nozzle to a distance of 5-7 mm from the speaker (not close!).
3. Turn the vacuum cleaner on for 2-3 seconds. Repeat 1-2 times.
4. If the speaker had metal particles (for example, shavings), bring the magnet to the body - this will help to remove them.

⚠️ Warning: Never use a compressor or compressed air canister - a pressure jet can tear the membrane of a Redmi speaker 9A. The vacuum cleaner works on the principle of suction, not blowing!

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If you don't have a vacuum cleaner on hand, you can use a cold-air dryer (minimum speed). Keep it 10 cm away from the speaker and blow at an angle rather than directly into the holes.

Method 3: Removal of moisture (if the phone is wet)

If the Redmi 9A is caught in the rain, falls in the water, or condensates are accumulated due to temperature changes, the sound may become muffled or disappear altogether, in which case you need to dry, but not in the usual way!

What can't be done:

• 🔥 Putting your phone in rice (it’s a myth – rice absorbs moisture too slowly and can clog the speaker with starch).
• ☀️ Dry on a battery or under direct sunlight (overheating will damage the battery).
• 💨 Use a hair dryer in hot air (risk of deformation of plastic parts).

Proper drying:

1. Turn off the phone immediately and remove it. SIM-memory-card.
2. Wet the case with a paper towel (do not rub!).
3. Place your phone in a sealed silica gel bag (in shoe or electronics boxes) for 12 to 24 hours.
4. Turn on the device in a day and check the sound. If the wheezing is left, repeat the drying.

If moisture got only into the speaker (for example, after showering or sweating), you can accelerate evaporation with the help of alcohol wipes:

1. Wet the cotton swab in isopropyl alcohol (90%+).
2. Gently wipe the area around the speaker (do not pour alcohol inside!).
3. Wait 10 minutes and dry with a dryer in cold air.

Method 4: Disassembling the phone for deep cleaning

If previous methods failed, you'll have to disassemble the Redmi 9A to access the speaker, which is a risky move, if you're not careful, you can damage the plumes or disconnect the battery, and you should only use it if you have experience or video instruction.

Tools required:

• 🔧 Plastic blade (or mediator).
• ⚙️ Torx screwdriver T3 (Xiaomi screws).
• 🧲 Magnetic mat (so as not to lose cogs).
• 🔍 Lupa (for inspection of details).
• 🧴 Alcohol and cotton swabs.

Step-by-step process:

1. Turn off the phone and remove the tray for SIM-map.
2. Heat the back cover with a hair dryer (temperature 60-70 ° C) for 1-2 minutes - this will soften the glue.
3. Carefully tuck the lid with a plastic spatula, starting at the corner next to the volume button.
4. Unscrew 8 Torx T3 screws holding the metal plate.
5. Disconnect the battery plume (use a spatula, do not pull the wires!).
6. The speaker is located at the bottom of the board - clean it with alcohol and a soft brush.

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The most common mistake in disassembling the Redmi 9A is damage to the display plume, so if the screen doesn't turn on after assembly or if colored stripes appear, then the plume has moved or been bent, in which case repairs are needed in the service.

⚠️ Warning: After disassembly, the phone may lose its leakage.If you live in a humid climate, consider applying a new glue to the back cover or using a hydrophobic spray to protect the board.

Method 5: Professional Ultrasound Cleaning

If the speaker is heavily contaminated with oily deposits (for example, after getting cream or cosmetics), or there is a dried dirt inside, home methods may not help, in which case the best option is an ultrasound bath, which is offered in service centers.

How it works:

• 🌊 The speaker is immersed in a special solution.
• 🔊 Ultrasonic waves (frequency 20-40 kHz) destroy pollution on the membrane.
• 💧 After cleaning, the part is washed with distilled water and dried.

Advantages of the method:

• ✅ It even removes microscopic particles.
• ✅ Safe for electronic components (when properly configured equipment).
• ✅ Restores up to 95% of the original volume.

The average cost of the service in Russia is 500-1200 rubles (2026), some services offer comprehensive cleaning of all connectors and microphones for the same price.

Where to look for service:

• 🔧 Xiaomi official centers (warranty is maintained if the phone is not disassembled previously).
• 🛠️ Private workshops with reviews on Yandex.Maps or 2GIS.
• 📦 If the speaker is damaged irrevocably - the service can offer a replacement (part price: 300-800 rubles).

What not to do when cleaning the speaker

Some online tips can permanently ruin your Redmi 9A. Here is a list of prohibited activities:

Another common myth is that you have to knock on the phone to knock out garbage.

• 🔌 Disconnection of plumes (due to vibration).
• 💥 Cracks on the board (especially if the phone fell earlier).
• 🔊 Displacement of the speaker inside the body.

FAQ: Frequent questions about cleaning the speaker