title: rails rack cache - how to manually clear all the cache
body: <p>I cached a page via rack-cache, and now the browser never displays the updated page cuz its showing the cached version.  </p>
  
  <p>how do I clear all the cache?  (Note: I deleted all the cached pages from the rails_app_root/public directory).  I even tried disabling rack-cache but it still shows the cached version of the page.</p>
  
  <p>any ideas?</p>