Mr. Oversimplification here... If you are touching or rubbing...you're doing it wrong. lol! The main point is that every method we know of to "restore" coins properly does not involve physically cleaning, wiping, rubbing...no touchy!!! The difference is that you are "cleaning", we are trying to explain "restoring". The goal is to try and get back to an original metal surface. ANY cleaning alters the surface, metal is not as hard as you think, especially on a microscopic level. If you notice, every method we speak of has the goal of restoring original surface rather than cleaning to create or expose a new surface. Number one simplest way of 'restoring'...a quick soak in acetone. Because all it does is dissolve some dirts and oils without effecting the metal. No towel dry, no matter how soft the cloth...swish and allow the acetone to evaporate or a quick rinse in distilled water and set the coin down on a soft towel, but again no wiping! Some people will use alcohol (like 90%) to try and dissolve something like tape residue...and repeat the soak and swish but no rubbing. You used soap, surfactants can dissolve some materials off of a coin but as soon as you wipe that coin you've changed it forever and it's no longer an original surface, 'dirty' or not. If you have actual gunk on a coin like dried food or something you can soak it in a very diluted solution with a drop of dish soap or something and then rinse... The moral of the story being...no touchy!
In point of fact it does hurt them. The reason it hurts them is because all soaps leave a harmful residue on the coins, and if you just leave it there, it will cause corrosion. And no, rinsing with water will not get the soap residue off the coins. And on top of that, regular tap water also leaves residue on the coins that is harmful to them all by itself. That said, you can use soap and water on coins to soak them and swish them around in to help with removing ordinary dirt and grime. But once you that you must then use the proper acetone procedure to remove the harmful residues.
I don't know if you're aware this person is incapable of understanding. In one ear out the other. That's why I don't even attempt to explain anymore. It's but an exercise in futility when one isn't hearing.
It is barely worth the money. Poorly laid out and presented, incorrect numismatic descriptions, etc. etc. etc.
Too dogs I'm listening okay, but some of these pennies I have. I just want to get more of a better look and evaluation on them. That's why I'm asking for more studies and hopefully more improvement. I'm only asking because some do look like what's listed in these website's. Nothing ever came wrong of just triple checking your work right.
And like I said from the get go. If your not going to help and just insult me then ignore my post. I want people who will help and put me on the right track.