I'm glad I found this thread because I'm experiencing the exact same thing. I'm also using the ipv2 and what I notice is that my first few inhales (on any day or occasion) is extremely-extremely harsh. I choke and cough with a feeling like it's doing damage.... After a few more lighter and nervous vapes it seems to get smoother and easier. I'm just not sure why it's every single time I take the first few vapes... Can anyone with experience help?