Frequency of use, temperature used, and quality of the atomizer can all affect how often you will need to replace your atomizer or refillable cartridge.
Here is a question from a fan, login to view detail his/her question.
1. The burn out flavor.
2. E-juice is leaking.
3. Poor vapor production.
4. You need to set higher voltage to get similar vaping experience before.
More information refer to this post: 7 signs to show when to change your yocan vape pen coils