The longevity of softened Play-Doh depends on factors such as storage, usage, and environmental conditions. With proper storage in airtight containers or resealable bags, and by keeping it away from heat sources, softened Play-Doh can maintain its consistency for several weeks or even months. However, it's important to remember that the more frequently the Play-Doh is used and exposed to air, the quicker it will dry out. Regularly check the condition of the Play-Doh and apply the softening techniques mentioned in this guide when needed.