I'm vaping tobacco straight up, none of that weird nicotine liquid. It's been about a week and I have noticed massive improvements. The constant throat phlegm and congested ears have almost gone away completely, I feel like I am breathing easier, it tastes better, I don't smell like smoke, I do it way less than cigs, I save money, etc.
I didn't know that the glycol in ecigs had that effect over time. I'm glad I didn't go that route.
I read it was harmless though. Are you sure you're just not out of shape?