htaccess - How to force the client's browser to clear the cache?
You can force browsers to cache something, but
You can't force browsers to clear their cache.
Thus the only (AMAIK) way is to use a new URL for your resources. Something like versioning.
As other answers have said, changing the URL is a good cache busting technique, however it is alot of work to go through a bigger site, change all the URLs and also move the files.
A similar technique is to just add a version parameter to the URL string which is either a random string / number or a version number, and target the changed files only.
For instance if you change your sites CSS and it looks wonky until you do a force refresh, simply add ?ver=1.1 to the CSS import at the head of the file. This to the browser is a different file, but you only need to change the import, not the actual location or name of the file.
e.g:
<link href="assets/css/style.css" rel="stylesheet" type="text/css" />
becomes
<link href="assets/css/style.css?ver=1.1" rel="stylesheet" type="text/css" />
Works great for javascript files also.
I got your problem...
Although we can clear client browser cache completely but you can add some code to your application so that your recent changes reflect to client browser.
In your <head>:
<meta http-equiv="Cache-Control" content="no-cache" />
<meta http-equiv="Pragma" content="no-cache" />
<meta http-equiv="Expires" content="0" />
Source: http://goo.gl/JojsO