This deodorant really does come through for you when you least expect it! The directions say to click twice & apply it at night before bedtime but I also apply it in the morning! I was under the impression that it would keep you dry all day but of course, it does take perspiration to activate the formula! One thing that I noticed in using this is that although I still do perspire, the perspiration does not soak into & stain my clothes like it used to. The cost of the deodorant is more than I usually pay but I wait until I get coupons & the deodorant does last a long time. I still do not understand why they tout using it before bedtime but for peace of mind & confidence, I will do that!