The method comprises the following steps:

1. First install the PP assistant on the PC, and then connect the iPhone to the computer. After that, PP Assistant will identify the currently connected iPhone.

2. If the PP assistant does not detect the iPhone, it may be because the driver was not installed successfully, so you should follow the prompts to install it. Also, if the phone is connected to the computer for the first time, you need to unlock it on the iPhone and trust it. Click the Trust button.

3. When the computer recognizes the iPhone, you can see the option of "cleaning up garbage" at the lower right of the main interface window, and click it.

4. Then click "Start Scanning" in the new window to scan the mobile phone.

5. After that, you can see that the software is scanning the junk files cached on the iPhone, which will take some time.

6. When this scanning test is completed, directly click "Clean Now" to clean up the garbage in the mobile phone.

7. After cleaning, a prompt will appear, as shown in the figure below.