how long does open pack of cigarettes last Do Expire? Shelf Life Opened & Unopened Packs Pack year is calculated by

Tobacco has an off or musty smell

Moisture escapes, the foil seal is broken, and the tobacco is exposed to air and humidity

High temperatures can cause the tobacco to dry out, while fluctuating temperatures can lead to condensation inside the pack, which can ruin the cigarettes

The cellophane wrap around the pack helps maintain humidity levels, preventing the cigarettes from drying out

Methods to Rehydrate Cigarettes If you find yourself with a pack of stale cigarettes, there are a few methods you can try to rehydrate them: Use a Humidor: Placing your cigarettes in a humidor for a few days can help restore their moisture content

A: Some claim you can rehydrate stale cigarettes using humidors or damp paper towel methods, but the success of this method is questionable