I bought 3 Protanks, 2 from 1 vendor and another (boxed) from another different. I grabbed one and started vaping away. After 2 months or so I found my carrier purse filled with ejuice. Tackled it down to the Protank. It had started leaking from the glass/metal joint. No wonder I couldn't get a decent vape out of it! I could have crushed/washed it the wrong way. So I opened the brand new one and it's doing the same. When set down on its side it leaks like crazy. Strange it didn't do it before. I could attribute the first one to several things but the brand new one? No wonder they don't vape. There's no sign of cracks whatsoever!