How to reset iTunes Match

You know that feeling. You're struggling with a tech problem. You're stumped. Then, you find a post online. Someone had the exact same issue! It took them hours to figure out a solution, and then - when they probably wanted nothing more to do with that tech issue - they took the time and effort to post their experience and the solution online. That's Stephen Hackett and his post 'How to reset iTunes Match' on 512 Pixels. I hope you don't need his post, but I'm linking to it here just in case it helps someone, someday.