Ok I'm going to start by saying that my first line of defense is the wind. Always use it toy favor. Problem is the deer dint always know which direction they are supposed to come from. I don't believe scent control products make me invisible to a deer's nose. Anyone one that does is wrong. I do believe it makes your scent in the air smell further away and on the ground older by lowering the amount. I wash my cloths and put them into scent free bags and put my outer layers on outside the truck. Everything else gets a good dose of spray. I also shower in the mornings. I have become a HUGE fan of tinks vanish. Tried every one on the market and that's my preference. I got the proof this year multiple times deer (including old does) walked over my entrance route after spraying at one of my stands and never smelled a thing. Then one day I was running late and failed to spray my boots. Had a small buck come through and right away he pegged my trail. I don't believe you can do this and ignore the wind but a little backup always helps.