Can perfume Go bad ?!?!?

The change in the scent of a perfume is not completely preventable. Light, heat and air, plus other materials like dust, can degrade and change the scent oils. Roll-on perfumes, solid perfumes and droppers all increase the risk of change because they open up and/or touch your skin directly; spray bottles help them to last the longest because you do not touch the perfume or open the bottle. If they are kept in cool, dark places, your perfumes should last several years.