It's a product named Nose Jammer that comes in a spray can and smells exactly like vanilla. I used it a couple years. Most deer didn't mind it. some did.
I'm a fanatic about odor control. I won't bore you guys with everything I do, as few would willingly go through it all on a religious basis, and that's the only way I've found to consistently beat a whitetail's nose up until late season. Late season, I still do everything I did before, but now I'm getting picked up by around 50% of the deer that get downwind. Around half of those pick me up quickly dismiss me as nothing, while the other half react like I'd expect them to if I'd done nothing at all to combat odors.
I try everything, as being able to hunt stands with "bad" winds is a huge advantage that has resulted in a lot of the bucks on the wall. I keep hoping to find a short cut, as I'd rather not do all the junk I do to combat odors. In my honest opinion, both Ozonics and Nose Jammer are better than nothing, but neither are as effective as going absolutely nuts on odor control and treating every single item you bring in the woods with you.
I sort of hunt the wind in that I look at the pool of stands that I believe give me the best odds of scoring for that day. If I have 2 that I believe are the best and offer equal chances, I'll hunt the one that works best with the wind. If I have 2 that I believe offer good odds that work for the wind and 1 that offers better odds, but the wind couldn't be worse, I'll still hunt that 1 with the better odds and not think twice about it. I very rarely get winded (before late season) and can almost always trace it back to something I didn't treat.
The reason I believe it all falls apart late season is because there just aren't the natural cover scents, as everything is frozen, and that the deer are now hyper sensitive to hunting, having almost made it through the war. I am under no delusions that I'm destroying all my odors or stopping new ones from forming. I believe either the deer are picking me up, but it's so faint that they think I'm 500 yards away instead of 20 or that it is so weak that it diffuses to being undetectable by the time it reaches them. I have no clue which, but I do believe it is impossible to completely eliminate human scent. frankly, so long as that buck has no clue I'm there, I don't care which is the case or why it works.