Once opened, Sweet Surrender will last up to 6 weeks. Unopened and stored as indicated in a cool, dark place, it lasts for 2 years from the manufacture date, listed on the container. Various factors, such as heat, air flow and light exposure can affect the longevity of the attractant. We encourage you to use your discretion and change it out if the container is becoming overly full of insects, or if you feel it should be changed for any other reason. The Fruit Fly Trap can be reused indefinitely, and refills of the Sweet Surrender can be purchased separately.