Yes, but only if the coil supports both. Caliburn coils with higher resistance are great for nic salts; lower ohm ones work better with freebase.

Most Uwell coils work best with 50/50 or 60/40 VG/PG e-liquids, especially in pod systems like Caliburn.

Yes, always let the coil soak in e-liquid for 5–10 minutes before use to avoid dry or burnt hits.

If you taste bitterness, see dark liquid, or notice a drop in vapour, your coil is likely burnt and should be replaced.

Yes, Uwell offers different coil options (like mesh and standard), switching between them can improve flavour based on your e-liquid and vape style.