Because, as the saying goes, ‘every house has its own custom’, every atomizer (be it an RTA, a stock coil, or even a pod) gives a different flavor. Because every atomizer has its own characteristics. Some deliver sweeter flavor, others have higher TH, .. it’s like that. You have to experiment. This is what it’s about..
And this is just my own opinion… 
Everyone does it the way it’s better for them. However, if you need help, we are here…
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