rear window washer fluid freezes on 2006 Chevrolet Tahoe

Fluid in the rear window washer seems to freeze as soon as ambient temp drops below 32F - and stays that way until temp rises above freezing for a while. Is there any known fix or workaround?

Asked by for the 2006 Chevrolet Tahoe
Remember the rear washer lines are a long way from the front reservoir and just because it has washer fluid in it, doesn't mean the hoses and rear nozzle does. Make sure and used at least -20 fluid and run it several seconds thru the rear system. I've found this to help.
Thanks to ProChevy for answering. Will try running fluid through BEFORE it gets cold!