After one (unfortunate early) experience, I clean mine. Usually disassemble, wash in soapy hot water (dawn is good) and then the Ultrasonic cleaner. Why not? Is my thought as I did not much CARE for the taste of machining oil. I find the Siren V2s to be a bit sketchy in that regard. I sometimes wonder if those complaining about the taste haven't washed them thoroughly enough.
Lots of great ideas here BTW. I think most of them (probably ALL of them) are going to work better than not cleaning them first.
I kind of also have gotten a bit vigilant about my cleaning experience when replacing coils and etc. (and the 510 pin) it's not unusual to get a bit of leeching/seepage, and I have found clean equipment works best.
Except for my CLR tanks, those I agitate as LITTE as possible (oh they still die) but if a coil is "reading" I am far more likely to NOT remove it and dry burn and rewick ON the mod, because frankly I LOVE that coil, but the tanks.... I've lost count of how many I have killed. I seem to be the only person who is having that issue, so apart from the ones I have catastrophically dropped, well, I must be doing something VERY WRONG. Wish I could figure out WHAT, man. Sigh.
Anna