for me, the cotton/coil lasts about 2-3 days on my drippers before I need to dryburn coil and rethread a new cotton.
It really depends on the juice you're using IMO. I have a micro coil with cotton that is at least 2 1/2 weeks old and I have not even had to change the cotton (juice is Grenada from elevated vaping). I have another, same setup and both are 1.3 ohms of 28 gage kanthal and I have to change the cotton every 2-3 days and dry burn the coil. That juice is K-Max Menthol from vermilion river. It gets really gunked up and needs a dry burn.








