Even after the complete removal of applications on the mobile device, there are many files that clog up your gadget. These are error logs, temporary files, cache files, and so on. Naturally, the more such files accumulate, the slower your operating system starts working. In order not to tolerate this and keep your device clean, you can use this official application developed by the creators of Android.
It should be used only for root devices, moreover, you should be very careful, since the tool is powerful enough and by chance, inattention or ignorance, you can delete system files, which will lead to a "crash" of the system. The latest version of the system application SD Maid - Cleaning the system download for android.