The iClear 16 coil should last from between 2 weeks to 4 weeks. Depending on usage.Because we keep them at a low cost, we always advice our customers to change them frequently to have a more enjoyable experience.
Please Note: Only fits the iClear 16 Clearomizer and you change the coil from the bottom of the iClear. To replace the coil. you unscrew the old coil and twist the new one on tightly.