There are little one way valves in the washer system to prevent all of the fluid draining back to the resevoir. I am not sure where they are on your car, perhaps up near the nozzles. At any rate, I had on that was clogged, replaced it an all was well.
2000 Dodge Grand Caravan SE
No matter what you fix, there will always be something else to fix..
"Warranty" is just another way of postponing the inevitable.