snap swivel on the line or line tied directly to the hook?
One lake I fished on I was using redworms. It was almost like something was wrong with the worms - the fish avoided them. Switched to wax worms and problem went away.
Fishing this past weekend was tough - post cold front.
Try it without feeding for a while, it can't hurt. It could be that the majority of BG were bedding too, and weren't interested in feeding unless the bait was put in the bed.