Once, I tested bluegills by putting scent on a small piece of paper towel. Tried Kicknbass, Berkley power bait, and I don’t remember how many others anymore. The fish swallowed the berkley one and spit out all the others. But, Berkley is waterbased so it does not really help us out much. According to the Berkley Chemist's book on bass, fish can’t taste oil based scents, they need to be water soluble. I think the oil based scents might help keep bad scents off lures more than anything else.