The iClear 30s
How long do the coil heads on thet iClear 30s last?
Depends on the juice. Sticky high VG stuff seems to burn them quicker, but they still last quite a long time. Once the juice starts getting darker with refills, I rinse the tank, wash the wicks, and then let dry overnight. If the wicks are starting to fray, that's usually a good indication it's time to change them out.
I ran 100% vg in my new iclear30 and it took about 5ml before I needed to dry burn the coil. Might be better on the s variant but I'm sure thicker juices will yield similar results.