Originally Posted by spensley
Two things you may want to take into consideration are...
a) when you are driving the vehicle, you are moving towards the stream of fluid, therefore, it will hit the windshield lower than where you aimed it when the car was in your driveway.
b) the fluid will want to move up the windshield once it hits, due to its own velocity, and secondly, the air movement pushing it up the windshield when you are moving.
Once I can get it to squirt above the wiper blade, your factors will come into play. I will aim it a bit high while its in the driveway so when using it at speed it will squirt in a good location above the wiper blade. When moving, the wind resistance will make it squirt lower than it does while stationary.