Thought I'd report on my good experience with OxiClean. I have acquired 12 racks of PCA secondary $1 chips, half never used, 200 slightly used, and 400 that needed a bath. I tackled a rack of the dirtier chips first with my usual method of Dawn, warm water, and a toothbrush, but although the chips were clean, they weren't nearly as white as the brand new chips. (My expectations are high.) Progressively longer soaks in warm water and Palmolive Ultra with Oxi had positive results but the chips still weren't as white as the new chips. Then I tried a Magic Eraser, and the chips showed additional improvement but still weren't snow white; I didn't really like using an abrasive on the chips. I contacted DCC but they seemed as if they didn't want to sell me a gallon ($78 plus shipping). Finally I picked up some OxiClean Versatile and tried a 5-minute soak with 1/4 scoop of Oxi and 2 cups of water, followed by testing with longer soaks and a stronger solution. Fast forward to the end --> I soaked one rack of chips in 1 scoop of Oxi and 4 cups of warm-hot water (could hold my hand in the water) for an hour, and the improvement was amazing. I soaked each of the 4 dirtier racks again, same mixture and time, and finally ended up with beautifully white chips. I think that two one-hour soaks is better than one two-hour soak. The edge spots did not fade at all. They're not perfect, but they're damn close. To be sure that in my zest for white chips I wouldn't damage them or the inlays, or cause the spots to fade, I started with conservative methods and checked them frequently. White Paulsons are the only chips I would get this aggressive with. YMMV. Before: After (cleaned chips on the right and in the center, minty fresh chips on the left). The variation in spots is due to the lighting.