About 2 years. I had big trouble with my throat with the gear I was using and developed eczema, which turned out to be unrelated or mostly so. So I quit vaping. Over a year later, I saw someone vaping and appearing to greatly enjoy it and realized I was envious and had really enjoyed it. So much so I was willing to risk it being bad for me and even the possibility of itching madly all over. From there it still took 9 months. Some of what it finally took was better equipment, but those saying I needed WAY bigger did me no favors.