You didn't prime the coil before vaping.
The E-liquid you fill in is not enough.
Improper vaping settings of power.
You vape too frequently.
Please prime the coil with low wattage for the first several puffs.
Please fill the E-liquid over the minimum line of UFORCE.
While vaping, please make sure the power of the MOD is within the power range that the coil can support.
Please stands for 5 minutes to get the organic cotton completely saturated before vaping.