You can dry burn nautilus BVCs safely. It works, and it works good.
Prior to trying that I've done vodka, boiling and rubbing alcohol, nothing quite worked. I god decent taste for a couple hours then muted again.
There's youtube videos on it but here's how I do it:
1) Clean the coil to remove juice
2) Dry it with hair drier
3) Dry burn it, pulse for 1 second until smoke stops coming out of the head, pulse some more for good measure
4) Clean it good with water again to remove the nasties. this is important, if you don't, you'll ruin the juice you put into your tank, it will taste like vomit because of the ash residues.
5) Dry it again very truougly with a hair drier
I'm on the third day of a cleaned one and the flavor doesn't seem to be going anywhere. It's even, as usual with BVC heads, a little too strong with some juices that need diluting.
I have also disassembled (and wasted) a coil after cleaning it to make sure that the wick and the cotton side things were intact and everything was fine. Not white like brand new but not burned either.
The topic is old but I don't see dry burning mentionned here. You won't be able to do it once they switch to cotton because of the (in my opinion) imaginary issues people had with the wicking material so you might as well do it whçile you can.