We know that not everyone wants to have their noses blasted from their face when they use a nasal inhaler. The reason for selling our Snift oil blends separately from our Snift Sticks is to give you complete control over the power of the scent that comes from them. How often it will need replenishing will vary from customer to customer, but we find that to keep our sticks smelling perky we top them up every 2-3 months.