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But the Greasemonkey script will warn you, as you are about to begin wiping your Facebook wall of Wall posts, comments, activities, and anything else that might display on your profile page. This is the final warning before you begin wiping content.
9. Click the OK button. This will begin wiping the content on your current profile view.
You should notice that your Facebook content has begun to disappear. It should have been deleted. You should refresh the page to play it safe to make sure that content has in fact been deleted.
10. You should notice that the content has been deleted. As you can see here, older content that is hidden from view may not have been deleted yet. Simply 'rinse and repeat', by refreshing the page and pressing the 'magic button' again.
A word of warning: This only deletes a mass of posts at a time. You may need to scroll to the bottom of each page to hit Older posts in order to wipe more, or keep having to refresh the page to retrieve older content. It's not perfect, but it's a far quicker way of deleting content than individually hitting the delete button on each post.
Along with others, it seems there is roughly a 90 percent success rate. I have tried this and it has worked, along with others with a majority of success. In some cases it has not entirely worked, only to work a second or third time. Be persistent. If it continues not to work, then try another method later in this gallery.
Also, in some cases, content can get 'stuck'. You may need to manually intervene to remove one or two posts that the script does not recognise, such as game or application activity, and then try hitting the 'magic button' again.
Eventually, once you continue to 'rinse and repeat' by refreshing the page and hitting the 'magic button', you will have no more content to delete. It would be wise to set aside an afternoon, get a pot of coffee brewing, and get your mouse-clicking finger at the ready.
Or, if you continue, and learn how to use macro applications, you could even automate this process to leave it (mostly) unattended. It's not a perfect solution, but it's quite speedy and requires little intervention once it gets ticking over.
Once you see the 'This is your Wall' message, you should have no more posts to delete. Success!