I wash mine but I will admit that I learned about doing that with the Siren V2. Machine oil is probably toxic because it tastes like FOOT CHEESE.
Someone else's foot cheese but still, yes.
As a dilettante vaper in the past I have Not Washed a Lot of Tanks because I was like, 'Well, I'm sure they made sure it was fine.... " if I even considered it.
But yeah, nothing too vile tasting (to be fair while dual using WHAT would I KNOW I tasted NOTHING) but like, yeah, it was kind of like me vaping all the husband's vapes one time and the coils were ALL burnt.
I was like, "Sweetheart, these taste a little TOO authentically like cigarettes, you need to change them."
He was like, "Uh, whut," and I was like, "Yeah, without knowledge we are ALL a bunch of ......."
I don't actually understand the discovery of fire OR the invention of the wheel. It's implausible.
So I am NOT here to judge but now you KNOW so you must WASH.
Anna