If you find that few, if any, fish nibble, please consider the possibility that maybe your problem isn't a case of your line just skimming along on the surface of the water.
If your effort is real then you're trying. You are clearly beyond fishing superficially.
Perhaps, what's really happening is that you dropped your line far too deep, deeply past where your favorite schools of fish roam. Your line has simply traveled past them on its way down. It now dangles beyond their range.
Reel your line in a bit, closer to the surface. By adjusting its length, you'll meet up with your fish and bring them home.