I have cleaned my diamond wheels just as I would my flat diamon sharpening plates. The flat plates require much more cleaning maintenance than the wheels. I use one of the non-abrasive cleaners with a wire brush and water. Bon ami is one cleaner that is safe. Barkeepers Friend is another. They work well. My Tormek diamond wheels don't require a lot of cleaning since I mainly use them for sharpening turning tools which is mostly just touch up.