I've just purchased the above rdta and everything was fine for a week or two getting a nice vape using a dual kanthal 0.3 ohm build at 75-80W but I'm running into wicking issues where I'm getting dry hits. I've tried using more cotton, less cotton and longer and shorter wick tails but nothing is making any difference. I've been building my own coils for years and never experienced a situation where I can't get the build right. I leave the juice flow fully open unless I'm filling. Does anyone have any advice or experienced the same problem? I love the tank and the capacity but I've had to go back to my squonker as I just can't get a decent vape from it! Any help would be greatly appreciated!