After having some minor repairs done (my Imac was under AppleCare, otherwise I would have done it myself), I noticed my screen STILL wasn't 100% clean, despite having it cleaned twice. So I Youtubed it, found a great tutorial on how to remove the screen (by ifixit.com) and went ahead to order the tools.
It was easier than I thought! Great tutorial, easy to follow... took only a few minutes to do. My Imac screen is crystal clear!
Yes, watch any of the tutorials from ifixit.com a few times so you thoroughly understand what you are in for. Also, buy the exact tools used... I could have bought similar tools here in Australia, but considering it took less than a week to arrive, and was quite cheap, why would I?