Something like that. It's on day 56 of use, and it took about a week or 2 for me to learn how to dry burn it and get the guts to try it…so it's actually probably more like 20. I spent the first couple days trying–desperately–to get a good vape out of it (it was
really inconsistent right out of the box before being cleaned) and hoping for new cartomizers to come in. By the time they did, I'd sorted out the issues, and it took a long time to even bother punching them and putting them in a tank……then they worked about as well but died (flooding) within 2-3 days each.
Since then, I've dry-bruned another 3 vivi novas straight out of the box (and every few days) as well as a mini……the Atty I've gotten since then (which gets dry burned several times a day when I use it……only use it to try juices), and the atties I have left over from before that. My 510H has probably been dry burned 25 or 30 times in the time I've had it (only a few weeks) and it too performs just like it did after the first cleaning (straight out of the box).
I know there are ways to do it wrong. If you just hold the button and wait for the coil to start glowing, you could pop it or scorch the wick (or anything else that's in there)……and I usually turn my twist down to a little under 4V when I do it to give myself a little screw-up room. But, it seems like getting the rhythm of pulsing & blowing on the coil right, it really does just burn the gunk that's stuck on the coil, let it turn to ash, and then it's just a rinse or a blow (giggity) away from a clean coil that performs like it just broke in.
In the process of learning to do it right, you probably will pop a coil. I popped a vivi nova head (just not the first one I started doing it with) a while ago because I wasn't paying enough attention. But I've only done it once.
You can't dry burn cotton wicks, and you can't dry burn cartomizers……but honestly, it's so quick to do (using silica or, I assume, SS wicks) that I probably just won't bother ever cleaning cartomizers or cotton wicks……if I ever bother to use them.
Here's a good post on r/ecr about dry burning.