Welcome
@Crystaldm
There are so many factors regarding "best watts to run" and "how long a coil will last".
You got some good answers regarding the first - as others mentioned, start low and work your way up (especially with a new coil!) Keep in mind, different juices will taste better at different levels. So a setting that works well with one juice may be wretched with another. You will have to play a bit and maybe keep track of what works well where.....
Regarding coil life - same thing. Different juices (sweeter, darker) will be harder on a coil than lighter, less-sweet juices. Also, depends on how often you are using your mod.
I have the Nautilus and the Nautilus Mini tanks. I often soak my coil after one full-size tank full or two Mini tankfuls in unflavored vodka for a few hours or overnight. Rinse and let airdry.
When the flavor starts getting cruddy, it's probably time to change a coil.
Glad you're here. Pull up a chair and your vape and make yourself at home
