A3 Electric window fault ANY ADVICE WELCOMED

Hi there, I've a 2006 3door A3, the passengers window will go down very slowly, slowing more the more it goes down & stops between a CM and half way down, it changes each time, then goes slowly to a stop, don't know if it Goes rite down as not wanting to take the chance of having it stuck open( ive stopped using it) even when you press the button to put it back up it try's
to go down, again slowly & "Sticky" when it's stuck in any open position, after a few minutes and some physical assistance it eventually goes bak up,
Have cleared & sprayed Wd40 down the side runners (no difference) ideas would be greatly appreciated, thanks Ryan 👍🏻

probably needs a new mechanism. pull the door card off and take a look.

Thanks much mate will have a look, the white electric window motor. Yeah?