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Mothballs last somewhere around a year inside. Outside where it they get wet they will only last a few months. I can smell those thing while I'm typing. Smells like my great grandma
http://answers.ask.com/Science/Chemistry/how_long_...
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1. Keep the mothballs in an airtight container such as a jar when you are not using them to make them last longer. The chemicals in the mothballs evaporate in the air. If you eliminate
http://www.ehow.com/how_8725047_make-mothballs-las...
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Generally until they dissolve-say a couple months.
http://wiki.answers.com/Q/How_long_does_the_smell_...
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Wrap it in paper or something this will slow down the evaporation.
http://wiki.answers.com/Q/How_do_you_make_a_mothba...
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