I got down-voters remorse, as I don't think I was being fair. But now its too late for me to reverse it. Any ideas please?
In addition to @random's answer, you could also leave a comment asking the author to do a minor edit, so you can undo your vote.
- Bookmark the answer in your browser of choice. (Leave a note to yourself as to why you'll be coming back to the post.)
- Continue using the site until you have at least 2000 juicy rep points.
- Go back to the answer and edit it. This will reset the counter for votes.
- Reverse your downvote to an upvote or just take back the vote.
Or just wait for them to edit their post and undo or reverse your vote then.