RMc~
There are times when the fish just turn off. The Good News is it can be predictable especially when there is cause e.g fronts, storms, turnover ect.. Even then I would stick with it, Concentrate on non aggressive patterns e.g.. Vision 110's slow jerked half way down, small baits e.g. Baby Brush Hogs, finesse worms on drop shot rigs. Even if you don,t catch many fish the experience gained fishing tough water will pay off. I have picked up a quite a few Federation tournament checks with one fish.