Reply To: Contaminated Lap?/Over Cutting Facets During Polishing › Forums › Beginner Questions › Contaminated Lap?/Over Cutting Facets During Polishing › Reply To: Contaminated Lap?/Over Cutting Facets During Polishing May 24, 2020 at 3:39 pm #6584 hrayParticipant @hray Thanks Frank, this is so helpful! In addition to washing my hands between laps, do I need to also clean the master lap and the stone somehow? I have been wiping the stone with a damp cloth, but am not sure if that is a thorough enough method.