How does sugar floss expire?

Sugar floss, commonly known as cotton candy, can expire due to the absorption of moisture from the air, which causes it to clump and lose its light, airy texture. While the sugar itself doesn’t spoil, the quality deteriorates, affecting flavor and texture. Properly stored in a cool, dry place in an airtight container, it can last for several weeks, but exposure to humidity significantly shortens its lifespan.