Oh, totally true. It's a clearomizer. Sorry I wasn't more specific. I am using a CE4 clearomizer and try the flavors in a clear one so I can see what's going on with the liquid. It does start to taste a little bit "burnt" towards when it is getting low. You know I've tried other liquids in the same type of clearomizer and they didn't get this brown. Could it be something to do with the PG/VG, flavor or just the nicotine? Really new to this so not sure. Thanks again for your feedback