My brother used to host a weekly tournament for years. He joined the navy, and I took all of his chips while he is enlisted. They have never been cleaned before, and I have never cleaned chips before. They are dice chips. So I took the white chips, which were just covered in grime, and put them in my sink with some warm water and dish soap. I let them soak and then mixed them around and scrubbed the nasty one. I then rinsed and dried them. How did I do??