No, it's probably the foam membrane behind the door card that isn't sealing properly. Open the door an run a hose onto the window whilst watching the base of the door card on the inside for dribbles.
Remove the door card (wiki). Peel back the grey foam (without ripping it) from the offending area and re-seal, either by heating the existing adhesive or applying new gunk. I used B&Q gutter seal in a black skeleton gun tube for mine.
Remove the door card (wiki). Peel back the grey foam (without ripping it) from the offending area and re-seal, either by heating the existing adhesive or applying new gunk. I used B&Q gutter seal in a black skeleton gun tube for mine.
