Note. Clean the drain holes before washing the car.
You will need a screwdriver or wire.
Note. Work from below the vehicle. For clarity, the work was carried out on a car mounted on a lift.
So clean the holes with a suitable size screwdriver.
Drainage holes are located in the following locations.
Doors - eight holes in the front..
... and six holes in the rear doors.
Thresholds - six holes on each side.
Note. Drainage holes are located symmetrically with respect to the longitudinal axis of the vehicle.