A few years ago I started changing up the presentation before I would change the bait. If I was fishing with a weightless worm, and getting no bites, I would add a split shot up the line. Instant bite magnet.
Same with a jig. If the trailer was just hooked on the jig, I would pull it off and thread it on for a smaller profile.
Made me think that the bass weren't so much remembering the bait itself, but what the bait was doing during the retrieve.