Here is a good video showing you how to locate the ideal software for the job and then proceed and clean up your iTunes library in a short space of time.
Click the play button to begin viewing.
Watch and enjoy:
The software you need which is mentioned during that video can be downloaded online here: Tuneup for free.
I hope this has helped you. Enjoy your new cleaner library.

That’s not really accurate, as it’s a trial program that only does a limited number of fixes before requiring you to purchase an activation code. The program does work pretty well though. I had only one error while using the trial, and I have a pretty esoteric library.