I need the htaccess code to clear cache on client side

How do you force a website to automatically clear the cache files so that when the website is updated with new pics/ css, the new version is uploaded?

I know caching helps speed up the site when the user is browsing, so I'd like to keep that feature, but only for the latest updates.

I was told I need to insert directions in the htaccess files. If so, what is the code?

so, two parts to the code:
-website loads with the latest updates ( does not use cache stored on computer)
-website caches the new updates for use

-BUT if there are any future updates, then the website again loads with instructions to clear the latest cache.

for example, I used this:


ExpiresActive Off


FileETag None
Header unset ETag
Header unset Pragma
Header unset Cache-Control
Header unset Last-Modified
Header set Pragma "no-cache"
Header set Cache-Control "max-age=0, no-cache, no-store, must-revalidate"
Header set Expires "Thu, 1 Jan 1970 00:00:00 GMT"



but it didn't work! website on my computer still is using cache files from previous version. So it must be a different code.

I am hosting with www.50webs.com

Thanks.