Clearing your cookies and cache is a common troubleshooting step to make sure that old data isn't being stored and shown by the browser.
These are some resources to help you clear the cache and cookies in your browser of choice. If in doubt, you can also check the help files or support website for the browser you're using.
Frequently when you clear your cookies, you'll also have to clear your cache.
You can generally find the option to clear your cache in the Internet Options or Preferences area of your browser along with your cookies, history, and other options.