How to Clean Cache on Xiaomi Redmi 9: The Complete Guide

Xiaomi Redmi 9, released in 2020, remains a popular device, but it slows down over time. The main reason for the performance decline is often overcrowded system memory, clogged with temporary application files. Cache cleaning is a safe and effective way to return the gadget to its previous speed without losing user personal data. In this article, we will discuss in detail all available methods for freeing up space.

Accumulated data can take up several gigabytes, which is critical for models with limited internal memory. Regular maintenance of the system avoids sudden freezes and errors when running programs. Next, you will find step-by-step instructions that will help you correctly clean your device.

Why you should clean the cache on Redmi 9

Cache memory is a buffer zone where applications store temporary data for quick loading, such as a browser storing images of sites and a navigator storing map sections, and over time these files accumulate, taking up valuable space and sometimes conflicting with new versions of programs.

If you don't do maintenance, you may experience slowdowns or incorrect functions, and deleting temporary files doesn't affect your personal photos, contacts or correspondence, so the procedure is completely safe, and it's a standard technical operation that should be done once a month.

⚠️ Warning: Don't confuse cache cleaning with full resetting. When you clear the cache, your data stays in place, and when you reset the phone will return to factory state.

Use of the built-in Security application

The MIUI shell on Xiaomi Redmi 9 already has a powerful built-in optimization tool that allows you to quickly remove system debris and temporary files without installing third-party software, which is the easiest and most recommended way for most users.

To get started, look for an icon on your desktop called Security (green shield), launch the app and wait for the automatic scan to complete, and the system will analyze the memory status and suggest that you delete the files found.

• 🧹 Click on the Clean button in the top block of the screen.
• 📊 Wait for the analysis and click the Clean button in the window that appears.
• 🔄 Once completed, check the Deep Clean section for more detailed analysis.

The tool also allows you to select specific types of files to delete, such as remnants of deleted applications or advertising files. Be careful when selecting ticks so that you do not accidentally delete the desired documents. Standard cleaning only affects safe system debris.

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Use the Deep Clean feature once a week to find large forgotten files that take up a lot of space but are not needed by the system.

Cleaning the cache of individual applications manually

Sometimes the problem is with a particular application that has swelled to a giant size, so in Android, you can force the cache for each program to be cleared separately through the system settings, which is useful if the social network or messenger is not working properly.

To get to the desired menu, go to Settings, then select the App item and find All Apps. In the list, find the problem program (for example, YouTube or Telegram) and click on it. Within the menu, select the Memory section.

Here you will see two buttons: Clear and Reset, and you need the Clear (or Clear Cache) button below, and clicking Reset will delete all the application login and settings, which may not be desirable.

⚠️ Note: Clearing the app cache may require re-entering the account, as saved sessions are sometimes stored in temporary files.

Cache removal via Recovery menu

If the phone is unstable and the interface is not loading, you can use Recovery mode (Dalvik/ART cache, which often solves problems after updating the firmware. To enter this mode, you will need to turn off your smartphone.

Press both the volume button and the power button. Hold them until the Mi logo appears, then release the power, but keep the volume up. When the Recovery menu comes up, use the volume buttons for up-and-down navigation and the power button for confirmation.

Wipe Data → Wipe Cache → Confirm

Select Wipe Cache and confirm the action. The process will take a few seconds. Once complete, select Reboot to restart the system. This method does not delete personal files, but cleans system temp data at a deep level.

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Recovery Mode is a powerful diagnostic tool that helps when the phone freezes or can’t boot normally.

Automation of cleaning with scripts

For advanced users who have Root rights, process automation is available, special scripts can be used to configure cache cleaning on a schedule, but on standard MIUI firmware, the options are limited without superuser rights.

You can use the standard automation features in the Security app, and there's a Schedule setting that allows you to automatically start cleaning your memory at a predetermined time, like at night, so you don't have to do it manually.

Using third-party software-cliners is often less efficient than Xiaomi's built-in tools, they can consume resources themselves and display ads, and trust system optimization tools.

Frequent questions about memory cleaning

Users often ask questions about the safety and frequency of procedures, and here are the answers to the most popular queries related to maintenance of Redmi 9.