I'm not sure if that post is for me but I have four tanks that are glass and metal. I change the coils when performance goes down. I've only been vaping for two wks. and I've changed them all at least once. I really think it's the liquid that's bothering the coils and I'm hoping the new liquid I ordered helps. I don't mind replacing the coils every day if I need too as my main goal is to keep me off cigs. I'll change my coils prior to refilling any liquids and just roll with it for awhile. But I'm sure that I'll need to dig in deeper ;-)