Found this on another Forum and tried it and it works:
"My Favorite Coin Cleaning Tips"
Posted By: Monte <Send E-Mail> (24.20.73.121)
Date: Thursday, 14 July 2005, at 8:01 a.m.
Seems like this topic comes up a few times a year, so let me share the steps I go through for cleaning up my dirty, nasty modern 'flash money' coins.
What coins do I clean?.... I clean all of my modern clad dimes, quarters, halves and Susan B. dollars. I clean all modern nickels separately from the clad. I clean all pennies and Sacajawea dollars separately from the rest. NOTE: Make sure you separate the coins into groups as described!
I also add common 'wheatback' cents to my pennies, and no-date Buffalo and 'V' nickels to my nickel group. I have also done a run to clean up bulk silver coins, and have also used this procedure for sterling silver jewelry and gold jewelry on occasion.
What things do I use for coin cleaning?.... Assemble the following for a few hour session of coin cleaning every month or two (depending upon how many coins have been found to clean).
1.. Tumbler NOTE: I refer to a rock tumbler and not the vibrating case tumbler used by reloaders! I use a Lortone 2-barrel tumbler.
2.. Aquarium gravel. I prefer white synthetic type.
3.. Some type of seive to separate the coins from the gravel. I use a Garrett 'Grizzly' and a Gravity Trap gold pan combination.
4.. Plastic jar w/lid. I use a former peanut butter jar.
5.. Plastic container such as those used for cottage cheese, margarine, etc.
6.. Toilet bowl cleaner, liquid, such as Lysol, Sno Bowl, etc.
7.. Liquid dish soap. I prefer Dawn or the Kirkland brand from Costco.
8.. Cream of Tarter
9.. Bath towel
10..