I don't know if this is any help or not.
Toner - The black dust inside toner cartridges for laser printers...
Is carbon. When toner dust gets on "things" clothing, skin, carpet etc.
The BEST way to clean up the mess (minus the vacuum) is COLD WATER.
It comes right off of clothing and skit etc.
After all, the atomizer element (Coiled small wire that we cannot see) accumulates carbon. I would imagine over time, the carbon will reduce the heating action of the element, and we would either think the atomizer is dead, not performing correctly, or, we are having the 'burnt' taste.
I have an RN8041 on my flashlight mod. I've been using this for nearly 1 month on this mod, previously I used it on the NJoy ecig that it came with (purchased in November)
1 cleaning 1 time, cold water since November. Keep your atty's wet... This IS the key.
I run near the 5v range with this. and of course, the original NJoy was lower voltage.
I abuse my mod. Its still running strong. Please keep in mind, for those of you that have torn apart attys completely, you already know this info: the coiled element inside the atty is not much thicker than a strand of hair... coiled up like a micro-spring. Carbon will stick on this element I would guess.
Tobacco flavors are my favorite.
I hope this has helped a little.