3M Filter slips between screen and bezel

[RTAdams89]

I just got a 3M privacy filter and love it. For some reason though, there is enough space between the screen and the bezel at the bottom, that the filter slides down about an eighth of an inch. It doesn't sound like much, but it's enough to make an awkward line at the top of the screen. The gap seems to only be on the lower right of the screen/bezel. Any suggestions on what to do? Should I just wedge a strip of paper in there, or perhaps tighten a screw?

The laptop is a T400, 14.1 widescreen.