Inside the coin washing room, Rob Holsen uses heat lamps to dry some coins before putting them in roles Monday December 20, 2010. On the wall is a picture of his predecessor Arnold Batliner. Rob Holsen may be the only professional coin washer in the United States. He washes coins for the Westin St. Francis Hotel in Union Square, San Francisco, Calif., a tradition which began to keep ladies white gloves from getting tarnished back in the 1930s.