My comment was aimed more generally than just to you, some people act as if rubbing a 1964 roosevelt dime = church heresy. Anyway.... it's really simple to make a electrolysis cleaner. You need a power supply, and a "weaker" one is best for cleaning coins. They should all have a label or tag that tells what their power output is. The voltage isn't really critical but the amperage is! Something around 800 milliamps (mA) is great. Getting too much above 1 amp is getting too agressive. You also need it to have a simple 2-wire output. Next, cut of the component end, split the 2 wires and bare a little bit of the ends. Go to a home improvement store and get 2 alligator clips and connect them to the wires.
Next, you need a container. I like to use an old plastic coffee container because I always seem to have an empty one laying around.
Now, you need your sacrificial metal. You can use something as simple as an old piece of tableware (fork, knife, etc), but there CAN be problems with them, so I just use a piece of flat bar steel. I bend it into a "U" so that it sits in the bottom of the container with on end slightly above the rim.
Your solution is simple, mix a tablespoon of baking soda in water and fill the container.
Now, you need to know which wire lead goes on the coin to be cleaned.... put both alligator clips in the solution (touching nothing else, just the bare clips and DONT LET THEM TOUCH) and plug it in. watch to see which clip is producing most of the bubbles. Label this wire, it's the one you put on the coin.
Now you're ready! Connect the cleaning clip to the coin and the other to your sacrificial metal. Make sure the coin is completely submerged and don't let it get too close or touch the other metal. Experiment and watch it VERY close. I would give it one minute and then take it out and see if it cleans up any. Just keep going a minute at a time until its at the level you are happy with. It will also help if you can bear to make a light scratch on the rim to get the clip to touch bare metal.
Using a baking soda paste is a very mild abrassive that will help clean the coin quicker. It will leave the really clean parts bright and shiny, but that will tone down over time naturally.