title: How do I clear the browser cache programmatically on the iPhone?
body: <p>I am using the new Basecamp API for my iOS basecamp client app. I want the user to be able to logout and switch accounts. But I can't as the account credentials stored in the browser cache are used every time I request authorization. 
  I figured out I would need to flush browser cache to do this. How do I clear the browser cache?</p>