I drive Clio 1.2 Expression. After rainfall water collects in passenger side footwell and under rear seat squabs turning them into wet sponges. I've checked and cleaned the seals around the sun roof, doors, ariel, windows, boot and checked around the rear lights. With the rear seat cushions out and looking towards the back of the car, the water appears to be coming in around one of those nut type things with some sort of clamp over it, right hand side , furtherest away from you.(please excuse the non-technical definition) found by drying the area and dusting with talc. Can't find how it gets there though. HELP!!!