That's a really good question. I'd like to hear of any experiences people have with that also. All I know is I was putting out one of those scent wicks this year, during the last week of October, and I'd dip it in a bottle of doe in heat scent so it was completely saturated, and hang it in a bush or tree, near my stand. It was so strong I could smell it from 30 yards away if I was downwind. I know it was a lot stronger than what would be natural. But I did have a doe with two fawns come by and spend 30 minutes feeding right in front of me, and they were directly downwind from the scent, and it didn't spook them. The doe did stand in one spot for quite a while when she got directly downwind, and only about 10 yards away from the scent- looked like she was just smelling the air and not quite sure what to think. But she wasn't alarmed.