To keep it short, my coils are lasting a day on average. I vape a 12mg store bought Skittles flavor and occasionally mix it with 18mg Menthol juice between 25-30 watts. The coils taste burnt and get clogged with some black crud. I'm priming the coils with juice, doing the dry hits that's recommended, essentially everything by the book but I can't get any decent lifespan out of these coils. Any insight would be greatly appreciated!