How to delete messages sent to friends by WeChat by copying passwords?

1. Open the mobile phone input method, then click the four small square icons to pop up the options interface, and click Edit.

2. Then select "Clipboard", click the option of gear, and click "Clear Clipboard" on the page.

3. The option "Are you sure you want to clear all contents" appears on the page, and click "OK" to finish the deletion.