[s-cars] Windshield washer leak >> difficult to find!

[Voits]

Hi All:
After first spotting a leak on my garage floor and then watching my
windshield reservoir slowly empty over a couple of days (approx 1/2 teaspoon
per minute) I pulled reservoir, expecting to find a crack.

The tank appears fine, there are no leaks apparent from the pumps.  I filled
the tank with water and have it on the kitchen counter.  Dry. Am I missing
some source that could be intermittent?  Maybe a failure only evident 'in
situ', related to the torque put on the tank by the mounting flanges? Has
anyone replaced the seals between the reservoir and pumps?

Hate to admit that in my enthusiasm to find the leak I filled it without
noting the level of the fluid; the tank did not drain itself completely >> I
don't know whether it stopped at the level of the pump(s) or not.  Arggh.
Thanks in advance,
Steve Voit
Mercer Island, WA
95.5 urs6