I've had good success with it over the last 10 years. I don't dress until I get to the woods and keep it in an air tight container. I believe scent control is an all or nothing deal. I did speak to one of the developers of Scent Lok years ago and he told me that it doesn't eliminate scent 100%. Nothing does. He said it was designed for the deer to get an amount of scent signature that makes them believe you are 200 yards away and not 20 yards away. Makes sense. He said it was very important to place it in the dryer for 30 minutes after a few hunts to reactivate the charcoal. It does not need to be washed after every outing.