How to Clean Xiaomi Redmi Note 3: From Cache to Hardware Cleaning

Xiaomi Redmi Note 3 is a legendary smartphone that is still used by many users due to its reliability and performance. However, over time, even this “unkillable” device begins to brake, overheat and quickly discharge. The reason most often lies in clogged memory, overloaded cache and accumulated dust inside the case. In this article, we will examine all the ways to clean the Redmi Note 3 – from software methods to hardware cleaning.

It's important to understand that cleaning your smartphone isn't just about removing unnecessary files, it's a set of activities that include optimizing your system, removing digital debris, and even physically cleaning your device from dust. We'll look at each step in detail to make your Redmi Note 3 work like new again.

If you notice that the phone is slow to respond to touch, apps are slow to open, and the battery goes down in a few hours — these are sure signs that it’s time to do a cleanup, and let’s start with the simplest and safest thing to do — cleaning the software part.

1. Clearing cache and temporary files

Cache is a temporary file that creates applications that work quickly, accumulate over time and take up gigabytes of memory, slowing down the system. On the Redmi Note 3, the cache can be cleared in a number of ways.

The easiest way is to use the built-in MIUI tools. Go to Settings → Memory → Cleanup. Here, the system will show how much space is taken up by unnecessary files and prompt them to be deleted. This usually frees up from 500 MB to 2-3 GB of memory.

• 📱 Manual cache cleaning: Go to Settings → Annexes → All apps, select the right one and click "Clear cache." This is especially true for instant messengers, browsers and social networks.
• 🗑️ Removal of junk files: In the same "Memory" section, select "Deep Clean" - the system will scan the device for residual files after deleted applications.
• 🔄 Cleaning Dalvik cache: This type of cache is responsible for running the Android virtual machine. → Additionally. → For developers → Clear the Dalvik cache (if the partition is hidden, activate it by pressing the build number 7 times in About Phone").

Once the cache is cleaned, it is recommended that you restart the device, which will help the system reassemble the necessary temporary files and start from scratch. If after this procedure the phone still brakes, then proceed to the next step.

2. Memory optimization: removing unnecessary files and applications

The Redmi Note 3 came with 16 or 32GB of internal storage, and over time it gets clogged with photos, videos, music and installed apps. The first thing to do is analyze what exactly occupies space.

Go to Settings → Memory → Storage. Here you will see a diagram of the memory distribution by category: applications, images, video, audio, etc. Click on each category to see a detailed list of files.

• 📸 Photo and video: Delete duplicates, blurred images and old screenshots. Transfer important files to your computer or to the cloud (Google Photos, Mi Cloud).
• 🎵 Music and audio: Delete downloaded tracks you don't listen to anymore. Pay attention to the Downloads folder - there are often unnecessary files that accumulate there.
• 📦 Apps: Remove programs you don't use, especially games that take up a lot of space and often run in the background, consuming resources.

For deeper cleaning, you can use third-party utilities such as Files by Google or CCleaner to help you find and remove duplicate files, empty folders and residual data after uninstalling applications.

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If you take pictures often, set up an automatic upload to the cloud (Google Photos or Mi Cloud) and turn on the “Free Space” option, which will delete local copies of files that have already been downloaded.

3. Reset to factory settings: when and how to do

If cleaning the cache and deleting the files didn't help, maybe the problem lies in the system itself, and then a factory reset would help, a radical method that completely erases all data from the device and returns it to its original state.

Before reset, make sure to back up important data! Use Mi Cloud, Google Account or transfer files to your computer. To reset, go to Settings → Additional → Restore and Reset → Reset.

• ⚙️ Through the settings menu: The safest way.The phone will reboot and begin the cleaning process.
• 🔧 Through Recovery Mode: If the phone doesn't turn on or freezes, press Volume+ and power to enter recovery mode. Select Wipe Data/Factory Reset using volume buttons and confirm the choice of power button.

⚠️ Warning: After reset, all data will be deleted without recovery! Make sure you save contacts, photos and other important files.

Factory reset helps in 90% of cases where the phone is severely braked due to accumulated errors in the system, and after the procedure, the device will work as fast as after the purchase.

Make a backup copy of contacts|Save photos and videos on PC/cloud|Record passwords from accounts|Make sure your phone is at least 50 times charged%|Unplug your Mi Account (if you sell your phone)-->

4. Cleaning the system from viruses and malware

The Redmi Note 3, like any Android device, is susceptible to attacks from viruses and adware, and if you notice that the phone is running strange ads, installing apps, or running out quickly, it may be infected.

To check and clean up, use the built-in MIUI Defender or third-party antiviruses such as Malwarebytes, Dr.Web or Kaspersky Mobile. Run a deep scan and remove any detected threats.

• 🛡️ Defender MIUI: Go to Security. → The program will check the system for viruses, vulnerabilities and unnecessary background processes.
• 🔍 Manual check: Go to Settings → Apps and review the list of installed programs. uninstall suspicious applications that you did not install.
• 🚫 Blocking installation from unknown sources: C Settings → Additionally. → Confidentiality Disable the Unknown Sources option to prevent malware installation.

If the antivirus detects threats but can’t remove them, try running your phone in Safe Mode. To do this, hold down the Volume button when you turn on. Only system applications work in this mode, which will remove viruses that block normal operation.

⚠️ Note: Some viruses masquerade as system applications (e.g., Google Play Services or Android System) Before deleting, check the program name online to avoid removing an important system component.

5. Hardware cleaning: dust and dirt removal

Over time, dust accumulates inside the Redmi Note 3, which can cause overheating, antenna signal deterioration and even breakage of speakers or microphones. Hardware cleaning requires caution, but it can be done on its own.

To do this, you will need: a plastic spatula (or mediator), a soft brush (for example, for drawing), a can of compressed air, alcohol wipes.

• 🔧 Disassembly of the case: Carefully tuck the back cover with a plastic spatula, starting at the corner near the slot for SIM-Be careful, the latches are fragile!
• 🌬️ Dust purge: Use a can of compressed air to blow dust out of speakers, microphones and connectors. Keep the balloon vertical to avoid liquid ingress.
• 🧹 Clean contacts: Wipe the battery and board contacts with an alcohol wipe. This will improve the connection and prevent sudden shutdowns.

Pay special attention to the charging jack — often there is dirt accumulating, which makes the phone poorly charge. Clean it with a toothpick or a wooden stick dipped in alcohol.

6. Optimization of battery operation

The battery is one of the most vulnerable parts of the Redmi Note 3. As time goes by, its capacity decreases and the phone starts to run out quickly. To prolong the life of the battery, follow these tips:

• 🔋 Battery calibration: Once in a while 2-3 Fully discharge the phone before turning off, and then charge until 100% It helps to reset the charge controller errors.
• 🌡️ Temperature control: Avoid overheating (do not leave your phone in the sun, do not play heavy games when charging — 10-35°C.
• ⚡ Proper charging: Use the original power supply or certified equivalent. Do not allow full discharge (charge when charged) 15-20%) Do not keep on charging constantly after 100%.

Also check which applications consume the most power. Go to Settings → Battery → Battery Use. If an application uses too much power in the background, limit its activity or uninstall it.

On the Redmi Note 3, there is a frequent problem with a “bloated” battery – if the phone body becomes convex and the battery is swelling, DO NOT try to fix it yourself! This is dangerous – the battery can ignite. In this case, immediately contact the service center for replacement.

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If the phone turns off at 20-30% charge, it's a sign of battery wear, and then just changing the battery to a new one will help.

7. Update of firmware and core

One of the reasons Redmi Note 3 brakes is outdated firmware. Xiaomi regularly releases updates that optimize the system and fix bugs.

Go to Settings → About Phone → System Update. If an update is available, download it and install it. Please note that the latest official firmware for Redmi Note 3 is MIUI 11 based on Android 6.0.

• 🔄 Official Update: The safest way. All data will be saved, but it is recommended to make a backup.
• 🛠️ Custom firmware: If official updates are no longer available, custom firmware (such as LineageOS or Pixel Experience) can be installed.This requires unlocking the bootloader and may be unwarranted.
• ⚙️ Core and Mods: For advanced users, installing a custom core (e.g., FrancoKernel) to improve performance and autonomy.

If you decide to install custom firmware, be aware of the risks:

- There's a potential loss of data.

The phone may stop working (brick).

Some functions (such as fingerprints) may not work.

To install custom firmware will require:

1. Unlock the bootloader through the Mi Unlock Tool.

2. Install TWRP Recovery.

3. backup the current system.

4. Swipe new firmware through TWRP.

⚠️ Attention: Unlocking the bootloader will reset all data on the phone! Xiaomi can also block an account if you unlock your devices often. Use official tools and follow the instructions on the forums 4PDA or XDA-Developers.

FAQ: Frequent questions about cleaning Xiaomi Redmi Note 3