I'm putting this in a thread of its own (as am sick of having to look for it !).
Plenty posted this link originally & I think it is so useful that I wanted it to be easy to find, especially as many of us are using the nautilus or min now.
www.thexlab.com/vaping/aspire_nautilus_observations.html#General_Nautilus_tips
I was interested to read that the author of that link reckoned the stainless steel mpouthpiece was giving him cracked lips.
I've had a hell of a problem with my lips & last week bought a plastic mouthpiece for my min nautilus.
Six days later & my lips are back to normal - even kissable 