The only thing she does is fill the tank when it gets to about 1/3. The coil can't be gunkin at all or it would not put out the flavor and cloud production it does. She had another one in another tank that lasted the same up until I put it on a stick20 and burnt the wick by mistake. It had gone 12 months with no flavor loss. It's incredible and I wouldn't believe it if it wasn't right here happening. I think the fact that she only uses Apple Menthol in it, a light clear juice, and nothing else keeps it wickin good too.
Hey, one doesn't argue with success! She's got a miracle coil! Good for her.

Someday, when she decides to retire it, I'd love to see what a 12-month coil looks like inside.
That said, I vape a lot of menthols and mine are very, very clean and easy on coils.