The benefit of this study will be to give more information about the removal of site markings by skin preparation solutions. While the risk of wrong site surgery is currently low, everything possible must be done to eliminate any potential for this occurring. This study examines the marking used for total hip surgery; the risk of wrong site surgery is higher for those surgeries involving the digits or smaller areas of the body. In these areas, the marking must be perfect. Any elimination of the mark could result in catastrophe. If a mark is not well visible or partially erased, a culture is created where the mark is ignored, creating danger to the patient. If this is occurring with standard skin preparation solutions then either the solutions or the marking must be changed in the future. We hope that this study will help to eliminate any potential for wrong site surgery.