Please, Please PLEASE
Do NOT clean your coin(s)!
Cleaning destroys value!
Honest dirty coins have more value than cleaned ones!
There is a difference between conserving a coin (using safe methods to remove dirt, contaminants and other harmful items which will damage its surfaces) and cleaning a coin (using chemical or mechanical methods to alter the surface of the coin or the metal itself.)
Conserving a coin can in many cases not only prevent further damage, it can increase the value and protect the coin against future problems related to surface contaminants such as dirt, grease, fingerprint oils, smoke, and the like.
Cleaning a coin with the intent to "improve" its appearance -- whether that's a dip, scrub, wipe, or whiz -- alters the metal surface of the coin and removes originality.
Please don't conflate the two as they are very different processes with very different intentions. Regardless, conserving coins requires experience and care, and should not be attempted on anything you value greatly until you have learned the proper techniques, methods and substances involved.