First off, Shift + F5, usually does the trick
but often the simplest thing to do is to add a ? and a random string of characters to overcome cache issues, especially those imposed by your ISP.
The cache could be the result of your ISP caching the result in case its requested again, it then has a copy and doesn't get billed itself for traffic it needn't request.
so something like www.yourdomain.tld/targetPage.php?3981305 and that should force the cached copy to be refreshed.