Honestly I don’t know for sure but I have my suspicions. I asked a few questions in another thread about funky taste and if it could be my brand of Ti wire but those were never answered. Rather than take to YouTube or the web, I went on my own observations which was to do the normal alcohol routine then a magnifying glass. I took these photos to show best I can what I was seeing.
This is cleaning with the steel wool and alcohol pad wipe up. As you can see, there is what seems like stains on the wire although it is smooth. It’s apparently not superficial. Sorry for the poor focusing job.
This is cleaning only with an alcohol wipe down. I don’t know if you can tell, but there is obvious residue that the alcohol alone isn’t getting rid of.
My so while I’m not getting any answers with regard to the brand of Titanium (bought of Ebay, spool says VaporTech), I do feel as though this is not as advertised, and I’m using a lower grade metal.
So would I suggest using steel wool? I don’t know. Looking at @Pro_Vapes builds and knowing he did only an ultrasonic cleaner run, I’d have to say no. And if you do need to use steel wool, my guess is you’ve got some crap wire on your hands. That’s reason #2 why I ordered from another vendor.