A mesh coil is the most modern type of vape coil available, rather than the traditional Kanthal wire wound into a coil with cotton threaded through the middle, a mesh coil is a very fine mesh strip shaped into a tube shape. The cotton is formed around the mesh strip leading to a greater surface area of coil coming in contact with the vape juice at one time, which is thought to produce a much more flavourful and long-lasting vape than traditional coils.
Vape coils can last anywhere from one to 14 days, and the length of time is drastically reduced for Vapers that enjoy the sweeter flavoured e-liquids, such as dessert or candy flavours. Those that enjoy a plain mint or a simple tobacco flavour will get considerably longer from a coil than those who enjoy a sweet e-liquid. This is due to the sweetener found in some e-liquids that eventually crystallise on the coils and produce a foul, burnt taste.
A sub-ohm coil is essentially any coil that has a resistance of less than 1.0ohm, traditionally these types of coils were reserved for large sub-ohm, high-powered kits. However, lots of the newer pod-style kits come with sub-ohm mesh coil options that can operate at low wattages and produce excellent results.
To prime a coil is quick and easy, simply add a small amount of e-liquid to the cotton that’s visible on the coil itself before installing it in the tank or pod, then fill the pod or tank with e-liquid and allow it to soak in for a few minutes. With a brand new coil, it's best practice to start vaping it at a low wattage and gradually increase the watts every few puffs until you reach your desired power setting, this is recommended to avoid burning out a coil before it's fully saturated with e-liquid.
Many new vapers worry they won’t know when a coil is burnt out when in reality it's very apparent when a coil is burnt out or beginning to burn out. The flavour will become muted, the vapour will be reduced and the taste is off.