On Fri, 28 Jan 2005 15:41:22 +0000, Andrew Tsen <f00-bar@f-bar.com>
wrote:

>Sometimes, I can use the spray again after driving for
>a few hours. So it does indicate that something is
>freezing or stuck inside the tubes.

It probably indicates you've got summertime washer fluid in the
reservoir. Not enough alky in the mix to keep it from freezing.
Try a winter grade.