There are two ways of removing your comments.
1. For an individual comment you made on someone’s wall simply click the red X to the right of the comment you would like to remove.
2. If you wish your comments from all the walls you’ve posted on you will need to do the following:
*Click on My Account on the orange bar, upper right of your screen.
*Select “Edit Options” in the menu on the left of your screen.
*Click the “Deleted All My Comments” button and this will remove all comments posted.