This will be my 6th winter with my 2006 IS350 and I've never experienced this situation:
I've parked my car outside for the first time overnight and the temperatures got to about 10-deg F and neither of the left or right side jets could give me any washer fluid on my windshield. I thought it was the lack of fluid (without any warning on the instrument cluster), so I topped it off, but that didn't help. Eventually the right side (passenger) got to work, but the left (driver) still remained stuck even after I drove for 30-minutes.
Haven't tried it since this this morning, but I'm still confused how something like this could happen. None of the fluids I've used are summer only... rather -10-deg F rated.