Normally, after I comment on a friend's post on Facebook, I'll receive notifications whenever someone else also comments on the same post. But after about five follow-up comments or so, I stop getting notifications. Is there a way to re-follow a post in this case?
Facebook has standardised this with a feature called Get Notifications, which is accessible from the arrow menu in the top right corner of a post. To get notifications from a post on a friends wall, open the detail page of the wall post by clicking on the post timestamp (i.e. 2hrs) and repeat the same procedure with Get Notifications again.