This has always been my thought on it, there was a big debate a while ago on what caused juice
to darken. Between the heat and the .... wicking out of the coil...take a look at the coil I took apart on the blog, he's right, it goes both ways!
Yea, the crud gunking up the coil oozing back out into the juice supply.
My K1, I couldn't go more than 3 days before wham, nasty-foul tasting gunk-funk.
And just one of the reasons rebuilding coils is even better applied to a true RTA like a Kayfun etc.
Super easy, quick and cheap to just throw in a new wick for a fresh taste while the coil itself can last for months if you want.
And a dirty wick/coil doesn't funk up the rest of the tank like that.
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