One thing to note, I bought atomizers for an ego and I had the same taste. Horridly burning, maybe a little metallic. I was always told 3 to 4 drops to prime it. But I found that once I put 5 to 6 drops in it, I could taste the vapor again and had no burning taste, then when it almost got to that taste again i would drop 2 -4 depending. I have a feeling that your atomizer is not wet enough. But that's simply my observation.