I recently ordered 5 306 atomizers. When I received them, I took the dummy cartridges off to wash them out, and one of them came apart leaving part of the atomizer inside the dummy cartridge. I rinsed out the remaining 4 and tried them. They were all ok. So, I only had a problem with the one.
I sent one ticket. After a week, I sent another. It's been a week and a half since the second ticket, and I haven't heard anything back or received a replacement for the DOA. Nothing.
I may well have done it wrong somehow. So, I've decided to put the info here instead to make sure I'm doing it right.
Here are the pictures I took of the 5 atomizers so you can see what I'm talking about: