I found this on a website. Might give this a try.

"I fished with my uncle numerous times, but I remember one spring morning in particular when he turned to me as we were launching the boat and asked me to take an oath of secrecy. I was captivated by the proposition he presented. I'm going to show you how I catch all those big crappies, he said. But you have to swear that as long as I'm still breathing you won't tell another soul. And now, may uncle rest in peace, I'll tell you the secret. His technique was simple, but its effect was astonishing. When he caught the day's first crappie, he pulled out a dinner spoon and scaled the fish over a coffee can. He then added enough water to keep the scales moist. Every so often, he'd take a big pinch of scales and toss them near a bush or treetop. Then he'd drop his minnow-baited hook in the spot where he'd pitched the scales. I can't say for sure why it worked, but something about those sparkling scales fluttering enticingly down through the water column was irresistible to those slabs. They'd rise from their lairs deep in thick cover, rush straight toward the cloud of glittering scales and gobble up our minnows."

It's worth a try!