As a "best practice" hint....if you feel you really want to dry burn any of these wire materials I suggest you do it in a dark room with the pulse length only long enough to be able to see a faint glow. This can be repeated as many times as you need to in order to oxidize e liquid deposits so they can be brushed away. If done in this way no problem occurs for Kanthal, nickel or titanium alloys. Still I recommend ultrasonic cleaning rather than dry burning or a combination of the two. One can even put a bit of chlorine bleach in the ultrasonic cleaner if some deposits are particularly difficult to remove. Of course after any of these cleaning methods, a thorough rinse in running water is necessary.