Just got a batch of stardust clearomisers for my volcano inferno and 4 out of the 5 seem not to work. On the one that seems to be okish the vapour is poor. All seem to work electronically as I can hear a crackle from the unit. I'm wondering if it's an airflow problem. I've use the magma style clearos with no bother but wanted something a little bigger. I had an Iclear16 that worked Ok but it's old now. I'm wondering if anyone has any suggestions or has anyone else had issues like this. Blowing through to clear flooding doesn't work. They could all be duds but I doubt it and I feel I may have a problem getting a refund. Everyone states these CE4s are reliable but so far I think they're crap.