Sent control is the biggest black eye in hunting. It is without a doubt a waste of money. I am a guide and I hunt almost every day of bow season. I use no sent control I kill big bucks every year and sometimes they even come from downwind. Don’t waste your time or money with it. It does not work. Or don’t believe me listen to the people on the hunting shows that make money off you by hunting in pens and telling you if you just had a $1000 carbon suite $20 detergent $100 bag to transport your gear and $20 spray. You could kill big bucks like them. Sorry for the rage but when you see thousands of people getting ripped off it makes me mad.