So I been vaping with no problems for a few months now however I recently made the change to cotton wicks and been having an issue. I've noticed that I been getting something similar to a th but its different in that it makes me cough. Its kind of hard to describe but I guess a normal th would be more smooth and slightly bitter whereas this one feels like the vapor is thin and it gives off a coldish feeling in the back of my throat. It reminds me of that feel when I would swim as a kid and accidentally swallow water then get that chlorine taste. I tried to just vape through it but its not working as I will cough without fail. (pretty nasty cough) I use sterile cotton and havent boiled it but I was thinking maybe these cotton balls are bleached. Or is it just the fabric that Im not used too? Not sure but any help would be much appreciated.