I've started doing this: I fill up my clearos/rbas with flavorless base (various mixes of vg, pg and ethanol) and then add a few drops of flavored juice on the coil(not flavor concentrate, just regular flavored juice). You'd think that the flavor would diminish after just a few draws but.. it doesn't
It starts to wear down between 1-2ml of juice vaped and after you add a few more drops of a different flavor, it leaves no residual taste. Also the juice in the tank never goes dark and the coils seem to last a lot longer too.. i have not had the time to test this theory but i just made a new 10 wrap dual legged coil for my vivi nova a few days ago and the coil is still shiny metal).

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