Here are the results of my first cleaning experiment. A 5 minute soak in warm Dawn dishwater, then a light scrubbing with a soft toothbrush.That is why I ask before I do. Anything else I should watch out for? Warm Dawn water OK? Don't soak too long? I have no idea what I'm doing here. I just want cleaner chips.
I went through a random barrel of the 50 cents chips, probably the dirtiest and most worn in the set. I picked out the 10 dirtiest from the barrel and cleaned them as outlined above. I didn't think to take a before pic, but here is the after pic. The chips on the left are the ones I cleaned and the chips on the right were a little less dirty and have not been cleaned. They are now close to the same, but the cleaned chips still have lots of black in the embossed key mold grooves. Also, I think there was a little damage done to the inlay of a couple of the chips cleaned. Note the one at the bottom of the third column - that yellow area in the center of the inlay.
With a 5 minute soak and about a minute scrubbing each chip, this is looking like a 10-12 hour job if I do this with every chip. And I am not really satisfied with the results. I think I'm going to need to invest in an Ultrasonic...