Facebook notification won't go away?

[BOY]

The earth icon in the left hand corner next to the message icon always has a little red 1 on it. When I click on it, it will go away but if I exit out and go back into facebook, it comes back up and it's something I have already read. How do I get the number 1 to go away when I already the message? Thanks.

[holawhatsup]

Unfortunately, I think that's been happening to everyone lately. Facebook has been really glitchy :/ sometimes it works to click on the notification and refresh the page