I purchased a Nautilus AIO about a month ago. It worked fine (vaping, filling, changing coils) for around 3 weeks. The last time I changed the coil and filled it, there was no suction. It was like the airflow was completely closed, but it was wide open. I tried everything - I cleaned the entire pod, installed a new coil, etc. Still the same problem. So, I ordered 2 replacement pods. The very first time I changed the coil on one of the new pods, I encountered the same problem. No suction. This is really frustrating. I am now on the 2nd new pod and it is working fine, but it is the only one I have left. I really do not want to keep replacing pods to have them keep failing. Can someone please tell me why this keeps happening?