I have taken on a new wp site which needs some tlc. It has a pile of plugins I haven't used - one of which is 'WP File manager'
I made a simple change to the header.php - just to make sure i was in the right place. Change appeared on the site. Then I deleted the change, saved the file again and now - - - it is still appearing (on some browsers - I got a friend who has never visited before and my alteration is still there). I have reopened the header file and code shows that my alteration has been removed)
Can anyone suggest what is going on and how to get my alterations to the code to be reliably reflected.
(BTW I have asked for ftp access)