Hi todd, I think I know what you mean. I've used the PD for nearly a year (using different vape now) and even though its a great little vaporizer it did leave a taste on my mouth a bit. Hard to explain but basically the same as the smell if you put your nose near the chamber. I also suffered with a sore mouth sometimes which I think was the heat drying my mouth. I was using it excessively mind. The taste will always be tainted somewhat with these designs compared to glass. I think the PD would be a much nicer experience with a longer glass stem.