I just can't get rid of this nasty flavor. It's not a dry hit, it's like metal or something nasty. I've cleaned it several times with super hot water and soap, alcohol, and vaped at least 5 or 6 tanks through. I'm using 28g kanthal, 1.5mm diameter, .6 ohms and clean cotton that tastes great in all my other devices. I wonder if I'm melting the insulator? I'm running it on a stingray and a sigelei box mod and haven't pushed the wattage on it at all. Is anyone else having this issue?