My cell phone is pulled to 100% in a day. I only read novels. It shows that I pull to 100% every day. I use the System Manager to clean it up. The reason why the performance of the mobile phone declined was probably due to a large number of applications running, too much buffer, and the accumulation of junk files. In order to solve this problem, the following steps can be taken: 1 Use System Administrator or third-party applications to clean up: Regular cleaning of the phone's buffer, junk files, and applications through the system's own cleaning tools or third-party applications can help free up storage space and improve phone performance. Turn off unnecessary applications: Turning off unnecessary applications to reduce the running of applications can help save phone resources. 3. Regular data backup: Regular data backup to prevent data loss. If the phone's performance drops, you can try to restore the data or change the phone after backing up the data. 4. Limit the auto-launch permission of the application: Restricting the auto-launch permission of the application can prevent the application from running in the background and save mobile phone resources. By taking these measures, the problem of cell phone performance decline could be effectively solved and the good performance of the cell phone could be maintained.