I had previously posted Diamond Chip Cleaner's Patent in another thread. (here it is again) Cleaning solution - Google Patents Since that posting...I bought a small tub of TSP ... TriSodium Phosphate, which is the main cleaning ingredient in Diamond Chip Cleaner. Cost me $4.50 and that entire tub of TSP would probably clean upwards of 50,000 chips. TSP is available from your local hardware store. I used 1 Tablespoon of TSP in 32 oz. of warm water (for better disolving of the TSP) I let the solution cool before putting in the Paulson chips. I mixed up 2 batches of solution and cleaned 1000 chips. After soaking the chips for 15 miutes, I lightly brushed each chip with a soft brush and they came out beautiful. Rinsed the chips and put them on a towel to dry. Much easier work than using a bit of dish soap and lots of labor. You'll be surprised at how great a job this cheap alternative to Diamond Cleaner will do. Diamond Cleaner is a great product...it's just expensive if you have a lot of chips to clean.