Over the weekend I was shooting my Glock 21 with an X200 attached. The rig is new to me; I just bought it off of a friend. I wanted to make sure everything function correctly together. When I got home I cleaned up the gun and the light. I realized after I cleaned up the light that there was still a hazy residue on the lens. I must have tried cleaning it 10 times and it wouldn't go away. So I called Surefire today and they told me to "put a drop of water on the lens and then use the eraser of a No.2 pencil and work in a circular motion." I did it and it worked like a charm! Just thought I would throw that out there for any of you wondering how to do it.