Around instructables, I have seen a lot of comment chains that were on orange boards that were deleted but they still remained because they were deleted in the wrong way. This instructable will teach you how to delete the comment chains the right way.
Step 1: Find a chain that you can delete
Now this can be a comment chain on your orange board with no deleted comments or a comment chain that is only made of your comments without any other peoples comments later down on the chain. If it is not either of these chains, then it will not work.