Hi. Mu name is Matt. I'm new to the forum. I hope I've picked the correct forum this post. I'm not sure if you specifications since I just have a simple question. I will provide if needed. I've been vaping for many years. This past six months, I bought a new tank. I vape all throughout the day. I've noticed that my e-liquid I've used for several years, quickly becomes very brown and thick. This doesn't happen to any of my other tanks. I've questioned several people at the vape store and they all say it's normal. I've tried buying the best and highest cost atomizer, but still get sane results. Since none of my other tanks (that are much older) don't do this, I'm concerned. Any advice?