Boba's Bounty 100 ml purchased 9/28/13. Clean graham cracker taste in Kanger PT2 until yesturday when I started to get an acrid chemical taste--not unlike that of a burnt carto. Tried diferent heads (6 different heads--some used some new), tried dry burned and no dry burn, soaked in PGA or just hot water, tried even brand new heads straight from the bubble package. Soaked tank in white vinegar and refilled with BB. Finally gave up on the PT2 and used a clean RDA. Still the same acrid chemical taste. Does BB change taste over time. Does it go "bad"? I've gotten heavy into NETs the past 2 weeks. Is it common for your taste buds to change that much from NETs? Any suggestions or ideas welcome. BB is my ADV/EDV and I'd like it back.