Hi, Welcome to VU.
The eliquid that you use. Do you know the PG/VG ratio?
I just looked at the Smok Prince and for the life of me can not find the V-4 coil.
I do not have this particular device
I saw these coils below listed often, is it one of these coils?
Smok™ TFV12 Prince Coils / (Q4, X6, T10, M4)