Because of Chinese New year (yeah blame someone else) I am worried about my supply of VOCC coils for my Emow. I have kept all the used ones which last me about a week before they get a tinny sort of taste, make the atty very hot and generally don't produce much vapour. I pulled one apart that had a damaged O ring and was amazed by the amount of black gunk inside! I ran the rest of em under hot water and soaked them for about 12 hours. There were lots of black bits coming off. I pulled another one apart but it was still filled with black gunk and the metal of the coils was coated in black gunk. So then I boiled em with a 50/50 mix of Vinegar and water. Let em soak for a few hours and pulled another one apart. The cotton was brown (as opposed to black) and no obvious chunks of black gunk but the metal of the coils was still black and the cotton was partially disintegrated. So it seems I can improve them but not actually restore them to usability. Has anyone else tried to clean disposable coils? Have you had any success?