Ill start this from the beginning... I started vaping about 6 months ago on a victory e-cig and it was really weak and boring. Needless to say I went right back to analogs in about 3 days.. fast forward to 2 weeks ago I been doing research and decided to buy an itaste svd with 2 iclear 30's and I'm using 18650 batteries. I started vaping it without analogs 4 days ago and I bought Nhaler Nuport and 555 menthol.. the Nuport tasted great and I have been totally in loce with this mod... untill this morning :-( all of a sudden the juice tasted wierd/ burnt with a bad after taste. So I took the head and wics out of the iclear and cleaned the tank and put a new head in it and when I went to vape it again it still tasted like crap! It did not taste like this the first 2 days, could it be my mod or can the juice go bad? I need some help if anyone can help.. I have the regular 2.1 resistance heads and have been vaping it at 4 volts. Any help would be appreciated cause I don't wanna go back to analogs! The 555 menthol tastes ok its less menthol and more nutty but its ok for a day or 2. I just want my original taste back on my NUPORT lol..