I have no idea whether or not fish care about scent.....I used to drop my jigs into my gas/oil mix and never was able to tell whether or not it reduced the number of fish I caught vs. the number of fish my pard caught. Watched a video one time on trolling flies. Camera was lowered to watch the response of salmon following two flies.....one soaked in the oily bilge water and one kept clean....while the fish would make many passes at the two flies, they inevitably struck the oiled fly much sooner.

Biggest trout caught on a hike-in trip to Victoria Lake years ago was caught by me on a cigarette filter tied to resemble a streamer after having lost all my traditional flies on back casts against the steep rocky banks...was 20 in rainbow.

I smoke and my punch card doesn't suffer.

snuff said (not a typo)