I use the running water technique, and replace the coil about once a week or 2 weeks. An average vaper at about 2 - 300 puffs a day. If busy, 100 plus. Using SS coils on TC and it's a huge difference to kanthal. When I was on kanthal, I change about 3-5 days when I taste burnt taste. With SS, hardly until about a week into it. Then clean and vape on.