I've been doing a similar thing. I do a burn off every 3 or 4 days, but you might vape more than I do. I rinse the atomizer thoroughly with water, blow it out, then hook it up to a battery in front of a mirror and blow on the battery end until the coil glows orange. The battery cuts off after a couple seconds so I do this 3 or 4 times. Then I rinse the atomizer in water to get out whatever could be in there, then blow it dry, hook it up to a battery and blow on the battery end until I don't hear sizzling anymore. So far it's been working well for me. I've been using the same atomizer for 2 weeks now and I haven't seen any black bits or been getting funny tastes after the burn off. I have a RN4075, and the coil does appear as new after the burn offs.