A vape cartridge (or pod) doesn’t last forever. If you keep using it after it’s burnt or worn out, the flavor will be bad—and it could even harm your health. Here are the signs to watch out for:
1. 
Burnt Taste
This is the clearest sign. If you get a burnt or scorched flavor when you inhale, the coil and cotton inside the cartridge are likely burnt. Stop using it immediately to avoid inhaling harmful substances.
2. 
Bad or Faded Flavor
As the cartridge ages, the e-liquid flavor may change:
- It becomes dull or tasteless
- Or it starts tasting strange or off
This means the cotton inside is no longer absorbing the liquid properly.
3. 
Weak Vapor Production
If you notice the vapor output has dropped significantly—even with a full battery and enough liquid—it’s a sign the coil is worn out or damaged.
4. 
Murky or Darkened E-Liquid
If your e-liquid turns dark or cloudy inside the cartridge, it may be contaminated by burnt coil residue or built-up gunk. Once the liquid looks off, it’s time to replace the cartridge.
5. 
Frequent Dry Hits
A dry hit is when you inhale but the coil doesn’t get enough liquid—resulting in a harsh, unpleasant throat hit. This usually happens when the cotton is dried out or damaged.