1. Open the app and click the "Tools" option in the bottom navigation bar.
2. In the tool page, find and select the "Drinking water" module.
3. In the drinking water interface, click the calendar icon in the lower right corner to view the history.
4. Scroll down to the bottom of the page and select "Drinking water tracking".
5. Find the record you want to delete and slide it to the left.
6. Click the "Delete" button that appears. After completing the above steps, the record will be deleted and you can add a new drinking water record