Nice bluegills, real nice.
I tried Nanofil when it first came out and ran afoul of its missbehaving when one fishes slack lines, which I do as a matter of course with the very light lures I prefer. I gave up on it. I went back to GAMMA PolyFlex which I have been using for a long time. I have yet to find anything better.
When I get regular panfish nibbles but no real takes, I assume I have form right on my choice of tail and maybe not quite on it with the color. Or maybe form right and size a bit wrong; not always too big, sometimes too small. The nibbles tell you that you are close. You are probably just a tweak away.