I have heard, but don't know if true, that the new style manger duals use cotton. Personally I use my kangers till they loose flavor then rewick with cotton myself, its relatively easy to do once you figure out the correct amount of cotton to use....to much and the airflow sucks, and you will get nasty dry hits, too little and you will have hot spots on your coil and get nasty burnt taste....right amount and you will have yummy vape heaven
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