how long does open pack of cigarettes last Plain Cigarette Packages May Deter Smokers, Studies Show How Long Do Cigarettes Last:

Alternatively, stale cigarettes that have been exposed to moisture or stored in humid conditions for a long time may lead to the development of moulds or bacteria

If you need help to quit smoking, read How to Quit Smoking or visit the CDC website

According to a study by Lee, Kim, Lee, and Yang (1986) conducted at the Korea Ginseng and Tobacco Research Institute, cigarettes absorb and lose moisture depending on the air humidity around them

Myth 2: Adding Moisture Directly to the Pack Works Adding water or other liquids directly to the pack can over-humidify the cigarettes and lead to mold growth

The Final Puff: Do Cigarettes Really Expire

For instance, a pack of cigarettes kept in a cool, dry place (picture a tidy drawer) will probably hold up better than one abandoned in a sun-baked car