Depends. If it's a coil you built take the old wick out, dry burn the coil, put a new wick in. If it's an old style atty like a T3s, EVOD, CE4/5, etc. just take the atyy coil out, rinse it, dry burn, the put it back in. If it's something like an Nautilus, Atlantis, or Subtank you may just have...