I use the spray about 3 or 4 times a year on every piece of camo clothing I own. I also bought a bottle of the laundry detergant that kills the UV and scent. I use this when I wash my clothes about 3 or 4 days before hitting the woods. You can tell it is actually working to because by the fourth or fifth time you've washed/sprayed the camo is already fading a little bit