Salmon find their way back to the stream they were born in by sense of smell. Its susposed to be much greater than a deer. Think about all the things that you do each AM before getting into the boat. All the soaps , food , fuel , waste, etc. that you touch will leave a trace on your hands. I use it, put some on my hands before I touch anything in the back of the boat. Does it help? I think so, can't hurt. All those hunter guys hang their clothes outdoors all year to hide the smell. Maybe we should too