When you abrasively clean or wipe a coin, medal or token, you remove most, if not all, of its numismatic value. Only a rare or highly desirable item maintains much of its pre-cleaned value. (This is a general rule. There are, of course, exceptions, particularly when it comes to Ancient coins, or coins retrieved from shipwrecks.. Dug or salvaged coins are cleaned, to remove years or centuries of encrustation. This requires skill. It is also referred to as "Conservation.")
This has not always been the case. Up until the 1980s (or somewhere in that area), cleaning coins was acceptable. Older coins magazines can even be found with articles on how to make your coins look shiny and new. Now, "original surfaces" are all the rage.
Search some of the older threads on this forum. You will find that there are a few acceptable methods of removing unwanted substances, like dirt, verdigris or PVC slime from coins. Rinsing in distilled water, acetone soaks and rinses, and long soaks in mineral oil or olive oil, to loosen "crudulation" (JKK's word) are usually safe and effective. Wiping never is. (Ok, it might be effective, but it is never safe.)