You have to clean machined attys really well, those things come covered in machine grease and other nasty stuff. Never vape on one right out of the box. Use soap and water and be thorough. I've seen this with stuff I ordered on fasttech as well as stuff I bought locally (probably came from fasttech anyway)
Fasttech, the WalMart of Vaping!!!
Orders must take weeks to get from China to USA, its the only thing that keeps me from ordering anything from them.