I have a wodpress site that I recently migrated from a dedicated server to cloud servers. It was still showing me the old version (new content wasn't appearing) on my computer so I cleared cache and that fixed it.
On my phone it still shows the old version that doesn't have the latest content. A few friends have also told me they see the old version, so I am guessing a lot of my old visitors see the same thing.
How can I solve this? I tried putting this in the header.php of the site on the old and new server:
<meta Http-Equiv="Cache-Control" Content="no-cache">
<meta Http-Equiv="Pragma" Content="no-cache">
<meta Http-Equiv="Expires" Content="0">
But it hasn't helped.
DNS records properly point to the new site.
How do I fix this cache issue?