Good day Dan. I'm assuming that you used the hose-end applicator to
apply
the weed-b-gone..? If so, then this could be your issue. Hose-end
applicators are terrible at metering the chemicals which makes the
application really hit and miss.

I used the spot spray finger trigger type. I has the foaming type of
spray so you can see where you have treated the weeds.

For weed b gone to be effective, the weeds need to be _actively_
growing.
Seeing that you lawn is going dormant, I would assume that most
everything
is going dormant for the summer drought. Even though your watering the
area, the growth rate is slowing down. With that said, you could expect

results with in 3 to 5 days with final results with in 3 to 4 weeks
with
slow growth.

I have been watering heavily under the birch trees, thus the grass and
weeds are growing vigorously there. I did notice today that the
plantain weeds have started to, not wilt, get brown spots on the
leaves. Maybe another application of same will do the job. If not I
will try the glyphosate stuff.
Thanks for all of your help.
Dan