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

Xiaomi Redmi 9 smartphones have proven to be reliable budget devices, but over time, even the most optimized MIUI system can slow down. The main reason for the decline in performance is often the accumulation of temporary files known as cache. This data is created by applications for fast content loading, but over time grows to gigabytes, taking up precious space in memory.

Cleaning this data regularly not only frees up space, but it can also solve the problem of freeze-ups. It is important for Redmi 9 owners to understand the difference between system debris and important data so as not to delete excess. In this guide, we will detail all safe cleaning methods.

Why you need to clean the cache regularly on Redmi 9

Cache is a buffer memory that stores temporary files to speed up programs. When you open an application on Android, the system stores some of the data so that the next time you run it, it doesn't download it again from the Internet or storage. However, caching algorithms are not always perfect, and old files can conflict with new versions of the applications.

On Xiaomi devices with MIUI shell, the accumulation of garbage is especially noticeable due to aggressive advertising and background processes. If you do not maintain, free space quickly runs out, which leads to brakes. The critical threshold for Redmi 9 is filling internal memory by more than 90%, which causes system failures.

Cleaning helps to eliminate errors in the work of specific programs, for example, if YouTube stopped downloading videos or the browser gives an error, this is a simple prevention procedure that should be carried out at least once a month to maintain the stability of the gadget.

⚠️ Caution: Cache cleaning does not delete your personal photos, contacts or instant messaging messages, but is a temporary file that apps will recreate if necessary.

There are several levels of cleanup, from simply removing temporary files through standard means to deep cleaning through an engineering menu. For most Redmi 9 users, the standard methods we'll discuss below are enough.

Use of the built-in "Security" application

The easiest and safest way to clear the cache on Xiaomi Redmi 9 is to use the manufacturer’s regular app, which is already built into the system and optimized for working with the MIUI shell.

Run the Security app on the home screen. Click on the large green Clean button. The system will analyze the device and show the amount of garbage that can be removed, usually cache files, remnants of deleted applications and temporary installer packages.

After the initial cleanup, click on the “Clean All” button, and for a deeper analysis, you can go to the “Clean Up” section of the app, where the system will prompt you to delete large files, duplicate photos and cache of specific applications.

It is important not to overdo it with frequent complete cleaning through third-party utilities, since the Android system itself manages memory. Xiaomi’s built-in tool in this regard is more correct and does not disrupt the work of system processes.

Clearing the cache of individual applications through settings

If a particular application is not working properly or takes up too much space, its cache can be cleaned individually, allowing for selective, unaffected space.

And on Redmi 9, it's done through the system settings menu.

Go to Settings → Applications → All apps. Find the right program in the list, such as Instagram or Telegram. From the menu that opens, select Memory or Storage.

You'll see two buttons: "Clean" and "Clean All." Clicking the "Clean" button** (often with a broom icon) will only remove the cache. If you click "Clean All" (or "Reset"), the app will return to state immediately after installation, and you'll lose logins and settings inside it.

This method is especially useful for instant messengers and social networks, which tend to accumulate gigabytes of media files in cache. Regularly checking heavy apps helps keep the Redmi 9 on track.

Remove the system cache via Recovery Mode

A more advanced method is to clean the Dalvik/ART Cache partition through Recovery Mode, which does not delete your personal data, but resets temporary system compilation files, which often resolves problems after a MIUI update.

To enter recovery mode on Xiaomi Redmi 9, you need to turn off the smartphone completely. Then press the Volume Up button and Power button at the same time. Hold them until the Mi logo appears, then release the power button, continuing to keep the volume.

In the Recovery menu, you can control volume buttons (up/down) and power button confirmation. Select a language (if any), then find Wipe Data. In some versions of Recovery, you need to choose Wipe Cache, but in newer Xiaomi shells, you can often only completely reset or clean up via Wipe All Data.

⚠️ Warning: New Recovery versions on Redmi 9 may not have "Wipe Cache" option. Don't choose "Wipe All Data" unless you want to lose all files on your phone! If there's no cache cleanup, use other methods from the article.

If Wipe Cache is available, confirm the action and wait until it is completed. Then select Reboot → Reboot to System. The first download may take longer than usual.

Cleaning the browser cache and messengers

Browsers and instant messengers are the main memory eaters on Android, they store copies of visited pages and received media files. On Redmi 9, with its modest storage capacity, this is critically important to control.

In Chrome or standard MIUI Browser, go to the menu (three dots) → History → Clear History. Select the All-Time period and make sure that the tick is next to Images and other files saved in cache. Cookies and passwords can be left if you do not want to re-enter the sites.

In messengers like Telegram or WhatsApp, the cleanup is done through internal settings. In Telegram, it is Settings → Data and Memory → Memory Use → Clear cache. Here you can set up autodelete the cache, for example, after 3 days.

💡

Set up an automatic cache cleanup in Telegram (Settings → Data and Memory → Media Autodelete) so that the application never takes up excess space.

Regularly checking attachments in chat rooms allows you to manually remove unnecessary videos and gifs, which often weigh more than the application's text cache itself.

Comparison of cache cleaning methods

The choice of method depends on your goal: just to make room or fix a system error. Below is a table to help determine the best way for Xiaomi Redmi 9.

As the table shows, Xiaomi’s regular funds are the safest, and using third-party “accelerators” often does more harm than good by loading the system with ads.

Frequently Asked Questions (FAQ)

💡

Regularly cleaning the cache is a prevention, not a panacea.If Redmi 9 slows down even after cleaning, maybe the problem is a lack of RAM or the need to reset to factory settings.