I've searched the forums and really couldn't find anything spot on with the problem I'm having, but if there is something I missed please forgive me. Anyways Ive been vaping for about 2 months now. I've had no problems with coughing and not being able to Vape up to now. I was using an Aspire Nautilis mini, and I decided to get a Kangertech sub tank mini. This is where the problems have begun. I'm coughing like crazy with this thing. I've done mouth to lung hits, let the it sit in my mouth before inhaling and still cough like crazy and it's only with this subtank I'm now using. I was using the 0.5 ohm coil that was on the unit. I switched to the 1.5 to see if that helped and it didn't. I've adjusted air flow, played with wattages and voltages and really no help. Is there a reason this is happening? What would be the cause of me having a coughing fit only when using this subtank? By the way I'm using a 50/59 mix of e juice.