Roth
Pining for the Mountains
For me, it is
D). When taste is off/burnt
Interesting.
This is just pure speculation on my part, but do you think the decrease in taste is due to you going too long without refilling?
My line of thinking -> As you continue to vape past the buffer, you have vaped off all the goodies. What you're left with now is anything left over. Even super refined/clean oil will leave behind something after enough has been run through. As a result, you're holding the power button longer, trying to extract every last bit. This gets everything hotter, and starts to burn what's left, thus causing the decrease in taste.
Like I said, complete speculation. Just wondering if that might be what's causing it.