Ive been vaping it for 7-8 weeks now and have never had a bottle long enough to tell if changed any in taste. I ordered a sampler so I could get more bobas and try some other flavors, the others were straight tobaccos so I assumed it would take some time to steep as they were all pretty flavorless. I tried the last little bit I had in a 30ml bottle and it was sweet smooth and awesome, but my new bottle is flat and flavorless. I soaked my attys in hot water and let them dry, no change, I soaked them in alcohol, no change, I flushed them out with hot water at low pressure, still nothing. I put in some hypnotic mist (a really light flavor to me) and got plenty of flavor. Im ordering 2 new attys tomorrow when i get paid because Im freaking out trying to run down the problem. Every bottle I have ordered so far has tasted the same from first drop to last. For a 30ml bottle thats about a week and a half, but this last bottle went in week. Has any one ever had this issue?