Depends on the browser you are using.
If you are using IE then go to Pinwheel top right and click Internet Options.
Then general tab under browsing history hit delete.
For Chrome At the top right, click More .
Click More tools
Clear browsing data.
Choose a time range, like last hour or all time.
Select the types of information you want to remove.
Click Clear browsing data.
For edge click the hamburger (3 lines) top right
Click History and then you will see you can clear it from there.