Since I started vaping 3 years ago, I have struggled with heaviness in my chest as well as sometimes wheezing. Have tried several different VG/PG strengths, different venders and the way I vape but still have days that this is a real problem. Then realized that on days I mainly vape light colored ejuice I don't have these problems. I am trying to find ejuice vendors that indicates the color of the juice but have only found one, mount baker Vapor. They are okay but flavors are often bland and I have a problem with having to add extra shots to get a blueberry flavor when I order blueberry ejuice. I can order RY4 from one vendor and it is dark but another one has a light color so sticking to one flavor doesn't work. Have given up trying to find a light colored coffee, usually sweet and sour citrus flavors are light but the rest are mixed. Does anyone know of other vendors that indicate or at least show the color of the ejuice?