Perfume Application
The technique that many people use when applying perfume is to spritz it on the body's pulse points: wrist, neck, cleavage or behind the ears. But this is not the most effective way to preserve the scent and keep it lingering about you for any length of time, as the fragrance will rise and soon disappear. The most effective way to make your scent last is to layer it. Layering perfumes is the process of using products from the same fragrance line together in such a way as to retain their natural scents, making for a fuller and longer-lasting scent experience. You might begin with shower or bath gel and then rub in body lotion or spray with a matching after bath spray. Finally apply the scent preferably as perfume or eau de parfum, and make sure never to mix different scents or product lines.
Oily skin holds scents much more easily than dry skin, so those with dry skin need to reapply their perfume more often. Also remember to consider the temperature and season when applying perfume. If it is cold, your fragrance will need to be renewed every three hours or so. In a hotter climate, the scent will last much longer.
Perfume Preservation
Fragrance compounds in perfumes will denature and break down if improperly stored in the presence of heat, light, oxygen and other organic materials. Thus proper preservation of perfumes involves keeping them away from sources of heat and storing them where they will not be exposed to light. An open bottle will keep its aroma intact for up to a year, as long as it is full or nearly so, but as the level goes down, the presence of oxygen in the air that is contained in the bottle will alter the perfume's smell character, eventually distorting them.
Perfumes are best preserved when kept in light-tight aluminium bottles or in their original packaging when not in use, and refrigerated at a relatively low temperatures between 3-7 degrees celsius. Although it is difficult to completely remove oxygen from the headspace of a stored flask of fragrance, opting for spray dispensers instead of rollers and "open" bottles will minimize oxygen exposure. Sprays also have the advantage of isolating fragrance inside a bottle and preventing it from mixing with dust, skin, and detritus, which will degrade and alter the quality of a perfume.