I’m so sorry to hear of your experience. OFF!® FamilyCare Smooth & Dry will typically offer up to 6 hours of protection, depending on activity levels, humidity or normal perspiration. You'll notice a residual powder after spraying our product because we use a corn starch base. This provides a smooth & dry feel, and it can sometimes leave a white powder behind. This powder can easily be washed off and with a quick shake to the can, you should notice it doesn't leave this residue behind. In the meantime, it sounds like our product hasn't been working the best for you. So we can help further, please call us at 1-800-558-5252 and provide this reference number: 22506988. Can't wait to help you! – Mindi, SC Johnson Consumer Care