Well the reason I did it was because I felt like I could see the lines better (if there were any) after I took it out of its case. Whether I really could or not I don't know, it seemed like it though.
Yeah . . . I hate to say it, but I think it is an obsessive thing. I think if you can't see the lines in the window . . . it is a ! But, some people like to take out the strip, hold it to the light, etc.