According to a recent Doctor Oz poll, there is not a lot of consensus on how long you should use a towel before washing it. Some (16 percent) say they wash their towels daily, while most people say they do so less often, with 33 percent washing their towels two or three times per week, 40 percent once a week, and 11 percent only every two weeks or less frequently. Dr. Oz teamed up with NSF International’s Applied Research Center to find out how germy your towels are and how often to replace them with clean towels. Read more