One of the most problems that Facebook users
are facing, is when you are trying to
delete all you
r Chat messages. It's kind of impossible to do that
especially
when your Account is full of messages
, unless you keep deleting one by one until you
finish that, you may lose too much of time if
you do this. This trick is to add a button "Delete All"
in the head of message page, when clicked it will
removeall Messages that exists on that page, then scroll to
the next page.
4) You'll notice a new button named "Delete All"
5) Every time you click that button: You'll delete all messages on that page, then it will bring a new page.
6) Done! Keep doing that until you finish all messages.