The famous nocturnal Hex hatch of the Midwest (and a few other lucky locations) stirs to the surface mythically large brown trout that only touch streamers for the rest of the year.
I would rather tightly wrap my dubbing, wash of the fly after a fish landed, and false cast the heck out of it, blow on it, squeeze it, and add a little more floatant maybe. I often feel the water needs rested anyway.