How to See and then Remove Data
To get started, open the Settings app. Next, tap “Safari.”
Now, scroll to the very bottom of the screen and tap “Advanced.”
Next, tap “Website Data” at the top of the screen.
The next screen displays the websites that are using the most data. If you want to see them all, tap “Show All Sites.” To delete all of the data for all websites, tap “Remove All Website Data.”