I like to start at 3 and go to 4 after ~5 minutes.
Another nice technique is to start at 2, but turn it on 1 before you vape, wait some seconds so you can get below 180°C hits.
So if you are at level 2, you have 180°C,
now if you turn it on level 1, it will cool down until it hits 50°C.
If you...