Cleaning the Xiaomi Redmi Note 7 speakers: from dust to moisture – the complete guide

Xiaomi Redmi Note 7 is one of the most popular smartphones in the budget segment, but even it is not immune to problems with sound. Over time, speakers get clogged with dust, get moisture, wheezing or sound becomes muffled. If you notice that the sound in conversations or music is distorted, do not rush to carry the phone to the service: in 80% of cases, the problem can be solved by self-cleaning.

In this article, we'll give you a detailed photo guide, what tools you'll need, how to disassemble the Redmi Note 7 without the risk of damaging the plumes, and what to do if water hits the speaker. We'll also explore the unique nuances of this model: why the upper speaker is more likely to suffer from dust, and the lower speaker from moisture, and how to prevent it. No water - only proven methods from masters with 5 years of experience in repairing Xiaomi.

Signs of pollution of speakers: when it's time to clean

The first signal is a change in sound, but how do you tell the difference between pollution and hardware failure? Here are the key symptoms that tell you to clean.

• 🔊 Wheezing or crackling when playing music/calls (especially at high frequencies).
• 📉 Muffled sound: bass frequencies disappear, the voice of the interlocutor is heard "as from a barrel".
• 💧 Water under the grid: after rain or shower speaker "bubbles", and the sound is restored only after a few days.
• 🌫️ Visible dust under the protective net (if illuminated with a flashlight).
• 🔄 Unstable work: the sound appears, then disappears when the position of the phone changes.

If any of these features are present, the speakers need cleaning, and it's important that on the Redmi Note 7, the upper speaker (conversational speaker) is more likely to suffer from dust, and the lower speaker (multimedia speaker) is more likely to suffer from moisture, which is due to the design of the body and the location of the holes.

⚠️ Warning: If the sound is completely lost (even after rebooting), or the speaker squeaks on one note, it may be a membrane break or a contact break.

Tools and materials: what you need to clean

To safely clean the speakers Redmi Note 7 does not need professional tools, but also at hand tools (toothpicks or cotton swabs) better not to do.

What NOT to use:

• 🚫 Dental cleanings or metal objects – puncturing the speaker membrane.
• 🚫 Water or soap solution – leaves a divorce and oxidizes contacts.
• 🚫 Vacuum cleaner – can damage the membrane by airflow.
• 🚫 Compressed air (Cylinder) – on the Redmi Note 7 is a risk of tearing the seals from the microphone.

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If you don't have isopropyl alcohol, you can use vodka stronger than 50°, which contains enough alcohol to clean, but it evaporates worse. After that, be sure to dry the speaker with a hair dryer for 10-15 minutes.

Preparation of the phone: disassembly of the body

Cleaning the Redmi Note 7 speakers requires partial disassembly. You don't need to completely dismantle it, you just need to remove the back cover. Here's how to do it safely:

Turn off the phone and remove it. SIM-map|Remove the cover and protective film (if any)|Prepare the workplace: clean surface, good lighting|Take a picture of the location of the screws (if you twist them)|Make sure all the tools are at hand.-->

Disassembly steps:

1. Heat the back cover with a hair dryer (50–60°C) for 2-3 minutes. This will soften the glue. Don't overheat - the plastic can deform!
2. Insert a plastic mediator into the gap between the lid and the body (start with the lower left corner, where there are no plumes). Carefully lead along the perimeter, separating the latches.
3. After the lid "crushed", do not remove it sharply - under it are fingerprint plumes and NFC-antennas (on some modifications.

Now you have access to the speakers:

The top speaker (conversational) is located next to the front camera.

- Lower speaker (multimedia) - in the lower part of the body, under a decorative grille.

⚠️ Attention: On the Redmi Note 7, the plumes are attached with fragile latches. If you pull the lid with force, you can tear off the contacts of the fingerprint or vibration motor!

Cleaning the speakers: step-by-step instructions

When the case is open, we start cleaning, and the lower and upper speakers are cleaned differently because of the design features.

1. Cleaning of the upper (conversational) dynamics

This speaker is more likely to get clogged with dust because it's next to your ear when you're talking.

1. Moisten the cotton swab in isopropyl alcohol (do not drip on the speaker directly!).
2. Carefully swipe the safety net in circular motions, pressing slightly. Don't push hard - the membrane under the net is thin!
3. To remove dust from the depths, use a soft brush. Move it along the holes of the mesh, not across.
4. If the dust is not removed, repeat the procedure with a dry stick.

2. Cleaning of the lower (multimedia) dynamics

This speaker is bigger and more likely to suffer from moisture.

1. Remove the decorative grille (it is attached to latches or double-sided tape) and put it on the side with a mediator.
2. Under the bar, you'll see a protective membrane -- a thin black film -- don't take it off, it prevents dust from getting in!
3. Clean the outside of the membrane with an alcohol stick. If the membrane is torn, it needs to be replaced (cost) ~150 ₽).
4. To remove moisture, use a dryer in cold air mode (keep at a distance of 10 cm, 5-7 minutes).

After cleaning, check the sound:

Call the phone and listen to the quality of your voice.

Turn on the bass music – the sound should be clear, without wheezing.

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On the Redmi Note 7, the lower speaker is connected to the vibrator with a common plume, and if the vibration is gone after cleaning, check if the plume connector has moved away during disassembly.

Cleaning without disassembly: alternative methods

If you don't want to take your phone apart, there are 3 safe ways to clean the speakers outside, which are less effective, but they're good for prevention.

• 🎵 Sound vibration: Turn on the phone settings → specialty → sound-effects → "Clean the speakers (if any) or play back that frequency (50 Hz) - the vibration will push the dust particles out.
• 💨 Compressed air canister (only for external cleaning!): Hold the balloon vertically, at a distance of 15 cm with short presses (0.5 sec) blow the speaker grid. Do not tilt the balloon - liquid can fly out!
• 🧲 Magnetic method (metal dust only): Hold the neodymium magnet to the speaker (without touching!) for 1-2 seconds. Metal particles stick to the magnet.

These methods will remove up to 60-70% of dust, but will not cope with moisture or heavy pollution.

⚠️ Warning: If the wheezing gets worse after the sound cleaning, the dust particles clog the membrane even more, in which case, stop and disassemble the phone immediately for manual cleaning.

What to do if the speaker got water

Redmi Note 7 has no official water protection (IP-So moisture is a common problem, so act quickly and by algorithm:

1. Turn off the phone and remove it. SIM-Don't turn it on for at least 12 hours!
2. Remove visible water: - Wipe the case with a dry napkin (no pile). - Tilt the phone with the speaker down and shake slightly (don't shake much!).
3. Dry with alcohol: - Moisten the cotton swab in isopropyl alcohol. - Gently wet the edges of the speaker (do not pour alcohol inside!). The alcohol will displace the water and evaporate without a trace.
4. Use silica gel: - Place the phone in a bag with 5-10 bags of silica gel (they come in boxes with shoes or electronics). - Close the package and leave for 24-48 hours.
5. Check: - Turn on the phone in a day. If the sound is back, good. If not, dry again for another 24 hours.

What can't you do?

• 🔥 Dry with a hair dryer in hot air - the plastic is deformed and moisture can penetrate deeper.
• 🍚 Putting rice in rice is a myth! Rice doesn't absorb moisture efficiently, and its particles can clog the speaker.
• ⚡ Connect to charging until completely drying - the risk of short circuit.

Prevention: How to protect speakers from pollution

To avoid cleaning the speakers every 3-6 months, follow these rules:

• 📱 Use a speaker-protected case, such as models with raised edges around the grilles (like the Spigen Rugged Armor).
• 🚿 Avoid moisture: - Do not take your phone to the bathroom (even if it is "water resistant"). - In the rain, carry it in your inner pocket or use a waterproof case.
• 🌬️ Blow the speakers regularly: - Once a month, turn on the maximum volume for 10 seconds - the vibration will push the dust out. - Or use a can of compressed air (as described above).
• 🔇 Do not put the phone down on dusty surfaces (table, sofa).
• 🔧 Check the leakage: If you notice that dust is getting under the net too quickly, the protective membrane may have been torn. ~100 ₽).

Additional Lifehack: Put a thin mosquito net on the speaker's grille (sold in hardware stores). Cut the size of the piece, glue it to double-sided tape. It won't make the sound worse, but it'll protect you from dust by 80 percent.

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On the Redmi Note 7, the top speaker suffers from dust 3 times more often than the bottom speaker, which is because when you talk, the airflow from the user's mouth is directed directly to the grid.

FAQ: Frequent questions about cleaning speakers