I've tried changing coils multiple times but it hasn't worked. It's been tasting kinda nasty for about a week. I turned my wattage all the way down to 5w with no luck. I cleaned the tank and everything as well. It's an istick 40w with a melo 2 tank charging with a cord that barely lasts 30 mins at a time. I chain vape. But I've taken some breaks and it still hasn't helped.