I've got a v3 Seigeli Zmax Telescopic. I have 3 protank 2's. One of which won't work it. It seems to have no air flow. I can hear the atomizer firing, but there's no air coming through the protank. It will work on my cool fire 1. It fired on the zmax fine a few days ago. Any suggestions. I've tried taking the head out and cleaning the air holes. 
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