Window not dropping intermittently

[BigBadAl]

Hi everyone.

I have just purchased a 2001 boxster abs chuffed as punch with it.

I know the subject has been covered many times but my window dropping issue seems to be intermitent.

Sometimes the window drops when I open the door and sometimes it doesn't. I have also noticed that when the window doesn't drop, the interior light doesn't come on in the car and things like the lights left on alarm doesn't work.

I am guessing it is a sticky micro switch somewhere? But was hoping for some pointers. Thanks in advance