Spent a whole year trying to figure a way to clean coils. Never had any success. Bad taste or gum up after less than a tankful, to hard to draw and a host of other troubles. That was the reason I got into rebuilding stock animizers. Every tank I ever owned which is in the eighty's I presently own I would sit down and learn how to coil and rewick them and they then vape better than new. Rebuild them you can use better wire and wick and play around with different air hole sizes (vertical coils). Wife still uses animizers but I have totally switched to RDTA's. U-Tube is your friend for rebuilding animizers. CHEERS!.