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Car freshner longevity
I have designed a car freshner which would last for 30 days. However I have a dilema whether it would work for 30 days considering the transportation, storage and also keeping in mind that would lie idle in store before it is sold. Will keeping it air tight help and whether It will work for 30 days when unpacked and put to use. And how to decide the best before use date I am confused. Can anybody please guide me on this. My product is powder based
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