Hello, I am a new vaper, I started 3 months ago. My problem is that I haven't found a good mod for me. Currently I have an itaste vv with a protank 3 and it seems that I have to change the coil every 5 or 7 days. Am I doing something wrong? I think is not a problem with the battery but with the clearomizer. Could you give me some advise? Thanks in advance.