Found the reason of my blocked wiper washing:does your rear wiper washing work? Mine is pumping forever but does not bring a drop to the read window.
black rubber tube runs from the tailgate to the rear seats area, enters on the right-hand side and exits one the left-hand side of the vehicle.
The plastic battery cover under the seats did block the rubber tube on the right side of the car.
So watch out, if you remove and reinstall the bulky black cover under the seat. It may easily block the tube and your car may become flooded with soapy liquide.
thank you @Jean Mercier your pictures and support did motivate me a lot.
Last edited: