I have a Joyetech procore aries tank and I use the c1-s coils also know as the mtl coil. I vape at 25 to 30 watts, which is recommended. I prime the coils and bring the watts up slowly and take small pulls breaking in the coil. They are great for a couple days then I start getting dry hits. I have used 4 different coils and 4 different juices and still the same thing. I find if I close the airflow and take a few dry pulls, that gets rid of it for a couple hit's but then it comes right back. It's just not wicking as good as a new coil and I don't know why. The coil isn't gunked up from sweet juice, the cotton is still as white as new, but I still get the dry hit. I can chain vape all day for the first 2 days just fine but even if u take 3 hits within a couple minutes i get a dry hit. I tried poking some holes in the cotton with a pin, idk if it helped at all tho. Any help would be appreciated. I love the tank and the clouds and flavor, just not the dry hits. Thank you