Odd taste coming out of my NJoy

For most of the day today, I've been experiencing a pretty awful taste from my NJoy. At first, I thought it might have been due to my using Crown7 packings in my old NJoy cartridges. However, today I received the cartridges I bought from MyECig.com, and while they tasted fine for a bit, the same foul taste has come back.

It tastes/smells ever so slightly of sulfur...I'm afraid that's the best I can do to describe it.

Any advice?
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Just for the taste of it, Diet Smoke!
--My older brother.