Was out yesterday fishing one of the "meal holes" in the vedder canal.
Seemed only thing they wanted was roe or various colors of wool. I didn't have any roe but hooked and landed 4 springs (kept one clean doe). One was one green wool. 1st cast after the change up! Then didn't work after that. Another was on very pale cotton candy like wool. Another was on a small gold Colorado and the last on a pink/purple jig under a float.
I tried a small gooey-bob for 20 or so casts and a large gooey-bob for about 20 casts. Not a sniff.
So yeah, this didn't work for me but it could have just been the spot. They were sitting in a very specific spot and watching everything drift over their heads all day long. Seemed that very annoying (blade) or very subtle (tiny wool ball) was what worked for me. Or of course a big ball of guts hanging off your hook but I rarely fish the stuff.