I would like to know as well. I went out on Sunday in a light rain and used one. I would wait 20 minutes or so and do it three times pausing about a second or so in between. Didn't see one deer. But it was in a stand that I didn't putup, on someone elses land, didn't even know the stand was there. Horrible stand placement I thought. 5 yards from the most used trail. [:@]