Try a Gitzit you will have to play around with the weight--I tend to use ice fishing jigs for the weight they are small you just slide the jig up the gitzit then bite a small hole for the line eye and they cause the lure to go down in a swimming motion you just have to play around with it--keep in mind when they are spawning they are more apt to ignore lures but if you keep jigging they will strike out of anger--so keep presenting jigs and even spinnerbaits to them till you get a strike.