刘婆说明书上说: “They (lens) should be cleaned as carefully as you would a camera lens. Begin by using a lens brush to remove dust and then pure alcohol, high-grade glass cleaner, or pure water on a cotton swab." 这种实用的镜子应该比较tough, 只要镜片不被划伤就没啥大问题。所以买两个lens cover更重要。另外我看过刘婆的工厂tour video。镜子做过的振动,防水试验比我们平时用的环境要坏的多。特别是防水,出厂前每一个镜子都在水里泡过,以检验防水性。