How to Replace a Vape Coil
To replace your vape coil, start by unscrewing the tank from the body of the vape to expose the coil. If there's any vape juice still in your tank, dump it out. Next, unscrew the coil from the base of the vape by twisting it counterclockwise. Pre-saturate your new coil with 5 to 8 drops of vape juice so it won't burn, then screw your new coil into place. After you put on the new coil, replace the tank and refill it with fresh vape juice.
Unscrew the tank from the body of the vape to expose your coil. Every vape setup is slightly different, but in general, you can easily unscrew the tank from the bottom section. Hold the tank upside down and twist the tank off using your hands. If there is juice in your tank already, you can use a paper towel to avoid getting your hands greasy. Empty the tank of any remaining liquid. If there is any vape juice still in your tank, dump it out in your trash can. This way, you can replace it with fresh juice after you put on a fresh coil. It is helpful to replace your coil with as little vape juice remaining as possible. Unscrew your current coil from the base of the vape. The coil is also called an “atomizer head” or “replacement head.” You can use your hands or a paper towel to take off the coil. Twist the coil counterclockwise until it comes off of the bottom of your vape. A paper towel will help keep your hands clean. Pre-saturate your coil with 5-8 drops of vape juice. The cotton in your coil is brand new when you take it out of the package. If you place it directly onto your vape, it will start to burn. To avoid this, drip about 5 or so drops across the cotton from the vape juice bottle. Wait 30-60 seconds for the vape juice to absorb into the cotton. Use more or less juice, depending on the size of your coil. Make sure the coil you purchase is the right coil for your vape. Read your instructions to determine the type of coil or bring your tank to a local vape store. Screw your new coil into place. Insert the coil into the bottom of your vape, and twist it clockwise until it is secure. The white cotton should face upwards toward your tank. You want the coil to be tightly in place but not overly rigid. Replace the tank after you put on the new coil. Once your new coil is in place, screw your tank onto the vape clockwise. You can now refill your tank with fresh vape juice. Replace the coil every 1-2 weeks on average. When you should replace your coil largely depends on how often you use it. Typically 1 coil lasts about 2 weeks. If you use your vape very frequently, you'll have to change the coil more often, potentially every week. If you occasionally use your vape, you can go 2-3 weeks without changing the coil. Change the coil if the vape juice tastes burnt or less flavorful. Take a hit from your vape and pay attention to the flavor. If it has a burnt aftertaste or if the flavor seems sour, it is time to change your coil. Over time the juice starts to clog up the coil. If you use sweet, sugary juices, they may clog up your coil more easily. The sweetener essentially caramelizes on the coil as it heats up. Additionally, if your coil looks brown or black, this is a sign that it is burnt and you should replace it. Get a new coil if your vape produces very little vapor. Check the batteries on your vape to ensure they are fully charged. If the battery is not the issue, then small clouds of vapor are likely from the old coil. If this is the case for you, it is time to change your coil. To check the battery, plug your vape into the charger. Then, look at the battery indicator to determine if it needs charging. 
Unscrew the tank from the body of the vape to expose your coil. Empty the tank of any remaining liquid. Unscrew your current coil from the base of the vape. Pre-saturate your coil with 5-8 drops of vape juice. Screw your new coil into place. Replace the tank after you put on the new coil. Replace the coil every 1-2 weeks on average. Change the coil if the vape juice tastes burnt or less flavorful. Get a new coil if your vape produces very little vapor. 