So starting about a day and a half ago I started noticing this either burnt or metallic taste with my favorite juice. I am using a protank 2 mini on a itaste vv 3. The head reads at 2.1ohms (it claims 1.8 on it) and my vv is set at 3.5 v and at 8 w. It is a brand new head, I just put it in this morning thinking that might have been the case, but after about 3 or 4 hits I get that off flavoring again. Am I doing something wrong or are my taste buds just saying nope? Oh, it's a coconut flavored juice that I have used plenty of times before without having this flavor.