Rear Window Wiper Washer problems of the 2009 Toyota Corolla

I purchased a 2009 Toyota Corolla last year and have 8,000 miles on the vehicle at present. Winter is tough in buffalo, NY so I use the windshield washer every day. There is a design flaw in that when the car is stationary the washer mechanism works fine but when traveling from 30mph and up, the washer mechanism causes the fluid to hit the windshield very low even under the wiper blades and fluid runs up the windshield forcing the driver to turn on the wipers numerous times to clear the windshield for minutes after spraying the washer fluid. The washer mechanism is not adjustable being mounted under the hood so replacing them would be a waste of time. I have an appt. At the dealer where I purchased the car next Saturday to show them.