Replacement Vape Coils
Put a few drops on each wicking slot (where you see the cotton, NOT down the center of the coil), fill the tank, close off air flow leave space for an air bubble to flow, take one sharp pull with it closed. Let sit 10-15 minutes. Start out at low wattage, work your way up until you find the right flavor/ vapor production for your liking. This advice goes for pretty much every tank/coil on the market.