I know, I thought my coils where just gunking up quicker, turned it upside down to check the coils ect and when I picked the tank up, brown gunk came out the drip tip. This was using my Isle of custard juice that I have been getting for 2 years now, so I knew it wasn't that. Looked at the chamber inside and the black had turned to a golden brown color, yup, I've obviously being inhaling that coating.Yikes
Seems my perfect tank is not that perfect after all, pretty fed up about it, contacted my supplier now, something has to be done about this..