Washer Fluid Low Warning

[Cruiser]

2011 LR4 HSE - Anyone else have a persistent "Low washer fluid" warning on an LR4?
I've filled it to overflowing twice, and still won't clear. Not leaking at all anywhere.

 

[iconoclast]

Have you been using Rain-X or similar product? If so there may be build-up on the sensor causing the fault. If not the sensor itself may have failed on it's own.