The heating element of an atomizer is wrapped in a fabric. If not kept wet will burn very quickly. Once this fabric is burnt it does not absorb liquid efficiently and the atomizer can be damaged permanently by running dry just once. Your wick must be kept saturated before powering on and inhaling to prevent any damage or burnt taste. If all necessary precautions have been taken in keeping your wick saturated and you are still experiencing an unusual taste, it may be time to change your cartridge.