Variable: Depending on the packaging this could be weeks or days. Those with a way to provide air tight containment can hold their moisture for longer periods. Some lose it as soon as you open the pack/box and dry out over time depending on the humidity.
Answered 7/22/2013
5k views
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
9 doctors weighed in across 2 answers
90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more.
Ask your question