I have often asked myself the question..Which is better, use no bug repellent and swat (move) like crazy, or use the repellent and let every deer know where I am?..I have come to the conclusion that movement is much worse than the smell of insect spray. Deer may not associate the smell of bug spray with humans, but it is a foreign odor, which I try to avoid at all possible times. I think I have a better chance hunting 25 feet off the ground with bug (earth) spray on me, than sitting there swatting and cursing every mosquito and bug that's near me. Then again, maybe the deer will look up, see me acting like a nitwit and say..."That can't be a human"!