Passenger Electric Window Sticking Half way up

[cre8toruk]

Hi All.... just noticed that my passenger window on my 2006 S2 sticks when it's wound (electrically) all the way down. Trying to do the window back up results in it coming up about half way then sticking, no amount of back and forth on the button seems to free it.

I've managed to jiggle the glass so that it eventually does go up... Just wondered before I take the panel apart if there's anything I can look at first ?

thanks in advance,

8.

[Skaffen]

The most common cause is a guide rail screw:
http://wiki.seloc.org/a/Window_Problems

Less common, but I have a vague recollection that adjusting the in/out tilt can sometimes help if it's not a guide rail screw:
http://wiki.seloc.org/a/Window_adjustment