How to Clean the Speaker on Xiaomi Redmi Note 7: 5 Proven Methods

Xiaomi Redmi Note 7 is one of the brand’s most popular smartphones, but over time even it has problems with sound. A dusty speaker leads to muted sound, wheezing, or no bass at all. The reasons can range from ordinary household dust to moisture or fine debris entering the grille. In this article, we will discuss how to clean the speaker on the Xiaomi Note 7 at home without damaging the device.

It's important to understand that the speaker is a delicate component, and improper cleaning can make the problem worse. We'll look at both surface methods (without disassembling the phone) and deeper cleaning for power users. You'll also learn which tools you'll need and which ones you'd better give up so you don't mess up the speaker membrane or lose your warranty.

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

Before you start cleaning, make sure that the problem is the contamination, not a software failure or hardware breakdown.

• 🔊 The sound is quieter, especially at low frequencies (bass is missing).
• 🎵 Wheezing or distortions appear when playing music.
• 📞 During calls, the interlocutor is not heard, although the volume is at maximum.
• 🌫️ Visible dirt or dust in the speaker grille (can be viewed with a flashlight).

If any of these signs are present, it's likely that the speaker needs cleaning. However, before you start, check the sound settings: sometimes the problem is in randomly turned on Do Not Disturb or turn down the volume in individual applications. Go to Settings → Sound and vibration and make sure that all sliders are at maximum.

Also, avoid software failures. To do this, restart your phone or reset the sound settings to the factory (in the same section Settings → Sound select Resetting Sound settings). If the sound quality does not improve after that, start cleaning.

What not to do when cleaning the speaker Redmi Note 7

Many users make mistakes in their attempt to get back the sound clean, which can cause them to break down, and here are some of the forbidden methods that can harm your smartphone:

• 🚫 Use sharp objects (needles, toothpicks, knives) that puncture the speaker membrane or scratch the grille.
• 🚫 Blow the speaker with your mouth, saliva and moisture from your breath get in, which makes the problem worse.
• 🚫 Use aggressive liquids (alcohol, acetone, glass washing agents) that corrode glue and protective coatings.
• 🚫 Clean the speaker of the phone on, vibration from the sound can damage the membrane during cleaning.

⚠️ Note: If your Redmi Note 7 is still warranty, disassembling the case will automatically cancel it.

And you also don't want to use a vacuum cleaner, because it creates too much traction that can tear the speaker's membrane, and instead, you'd better use the gentle methods that we'll talk about later.

Method 1: Cleaning dynamics of scotch (without disassembly)

This is the safest way, and it's even for beginners.

• 📏 Narrow Scotch (preferably stationery or paint, 1-1.5 cm wide).
• 🔦 Lantern (for lighting the speaker grille).
• 🧴 Wet wipes (to remove glue residues).

Step-by-step:

1. Turn off the phone and get it out. SIM-card/memory card (if the speaker is near the slot).
2. Cut a small piece of tape (about 3-4 cm) and fold it with a sticky side outside, a loop (loop).
3. Carefully press the tape to the speaker grille and pull it over. Repeat 3-4 times, changing the section of tape.
4. Check if there are any dust particles left on the sticky side.

Turn off the phone and remove the cards

Prepare Scotch and Scissors

Light the speaker grille with a flashlight

Check the cleanliness after 3-4 passes-->

This method is good at removing surface dust and fine debris, and if the sound improves after cleaning, but not completely, try repeating the procedure or move on to the next method.

💡

For best results, use a low-adhesive tape (such as paint) that leaves no traces or damages the grille.

Method 2: Cleaning with a soft brush or brush

If the tape doesn't work, take a soft brush.

• 🎨 Painting brush (synthetic, with soft pile).
• 🧹 Clean toothbrush (new, not used for its intended purpose!).
• 🖌️ Makeup brush (thin, with long pile).

Algorithm of action:

1. Turn off the phone and place it on a flat surface with the speaker grille up.
2. Carefully, without pressing, swipe the brush along the grille in one direction (for example, from top to bottom).
3. To remove dust from the depths, tap your phone slightly with a grille down the table (not much!).
4. Repeat the procedure 2-3 times, each time shaking the dust from the brush.

This method is effective for removing dust from hard-to-reach areas. If the brush doesn't help, it's possible that the debris is stuck deeper - then disassembly will be required (about this in Method 4).

⚠️ Warning: Do not use electric blowers (e.g., to clean the keyboard) they create too much airflow that can damage the speaker's membrane.

Method 3: Use of compressed air canister

Compressed air (such as a WD-40 Specialist Contact Cleaner or a regular Air Duster) helps blow dust out of the speaker without disassembling the phone.

How to clean properly:

1. Keep the canister vertically at a distance of 10-15 cm from the speaker.
2. With short presses (1-2 seconds), deliver air at an angle of 45 degrees.
3. Do not direct the jet directly into the grid - this can damage the membrane.
4. After cleaning, turn the phone down with a grille and slightly tap on the case to make the dust fall asleep.

Important: Use only oil-free cans (indicated on the package).The oil contained in some cleaners can fill the speaker and disable it.

Method 4: Deep cleaning with partial disassembly (for experienced)

If previous methods have failed, you will have to remove the back cover of the Redmi Note 7, which is a risky method, as it requires carefulness and can lead to loss of warranty.

What you need:

• 🔧 Plastic blade or mediator (for putting the cover on).
• 🔩 Cross screwdriver (for unscrewing screws).
• 🧲 Magnetic substrate (so as not to lose the screws).
• 🧴 Isopropyl alcohol (70% or higher) and cotton swabs.

Step-by-step:

1. Turn off the phone and remove the tray for SIM-map.
2. Heat the back cover with a hair dryer (temperature not higher than 60°C) for 1-2 minutes to soften the glue.
3. Carefully tuck the lid with a plastic spatula, starting at the corner next to the on button.
4. Unscrew all the screws (there are about 10-12 pieces) and remove the metal plate covering the speaker.
5. Examine the speaker for contamination. If dust is visible on the membrane, remove it with a dry cotton swab (no alcohol!).
6. If the dirt dried, slightly moisten the stick in isopropyl alcohol and gently wipe only the speaker box without touching the membrane.
7. Collect the phone in reverse order, making sure all cables are connected correctly.

⚠️ Attention: On the Redmi Note 7, the speaker is glued to the body. When you remove the lid, do not pull it too much - you can tear off the plume or damage the microphone that is nearby.

Method 5: Software Diagnostics Before Cleaning

Before you do a physical cleaning, make sure the problem isn't the software part.

1. Start built-in sound testing: ##4636## In the menu that opens, select Hardware Test → Audio and check playback through the speaker.
2. Install a speaker test app (like Google Play's Phone Check and Test) to see if the speaker is running at all frequencies.
3. Check if the audio is turned off in the settings of specific applications (for example, YouTube or Spotify may have a separate volume control).

If tests show that the speaker is working normally but the sound is still bad, the problem is the physical contamination, and if the test comes up with an error (for example, Speaker failed), it may be that the speaker is damaged and needs to be replaced.

💡

Always check the speaker programmatically before cleaning, sometimes the problem is solved by resetting the sound settings or updating the firmware.

Prevention: How to protect the speaker from pollution

To avoid cleaning the speaker every few months, follow the following simple rules:

• 📱 Use a case with speaker protection (for example, with a small ledge around the grille).
• 🚿 Avoid moisture – do not put your phone near the bathroom or sink.
• 🌬️ Regularly (every 1-2 months) blow the speaker with dry air (for example, a pear for cleaning photo equipment).
• 🧴 Do not store your phone in dusty places (such as an open-top bag).

Avoid extreme temperature changes, as condensate from cold to heat can enter the speaker and cause corrosion. If the phone is wet, turn it off immediately and dry it in rice or silica gel for at least 24 hours.

Frequent questions about cleaning the speaker Redmi Note 7