I'm a big fan of Sterling's Magic All Purpose cleaner for cleaning dirty chips that are in otherwise good condition. It is affectionately known as the "Pink Stuff". But it is hard to find and is now selling for $45 for a small container on eBay, it used to be under $10. Recently I noticed a new product on Amazon called "The Pink Stuff" and is only $6 for a 18 oz. container, similar size to Sterling's, and if you are a Prime customer, shipping is free. I ordered one and cleaned a dirty chip with it and had excellent results. With more use, I might like it better than Sterling's. Just thought that I would give you a head's up with this review.