A vape coil is a small component containing a heating element, typically wire or mesh, surrounded by a wicking material, usually cotton. This assembly converts e-liquid into inhalable vapor. Since the coil is constantly exposed to heat and liquid, it is a consumable part designed to be replaced periodically. Knowing when to change the coil ensures a consistent and enjoyable experience.
Sensory Signals That A Coil Needs Replacing
The clearest indication that a coil needs replacing is a noticeable change in vapor quality. The most unpleasant signal is the “burnt hit,” which occurs when the heating element vaporizes charred wick material instead of liquid. This harsh taste results from cotton not being adequately saturated, causing it to combust upon firing.
A more gradual sign of decline is a muting of the e-liquid’s flavor profile. The clean taste fades, often replaced by a caramelized or smoky undertone due to residue buildup. This residue, called “coil gunk,” obstructs the heating surface and prevents clean vaporization.
Beyond taste, the physical output of the device will diminish, even if the battery is fully charged. You will observe a reduction in the volume and density of the vapor cloud produced. Additionally, excessive gurgling, spitting, or leaking often signal that the coil’s wicking material is no longer functioning correctly.
Factors That Accelerate Coil Deterioration
Certain habits and e-liquid characteristics shorten coil life by accelerating residue buildup or burning the wick prematurely. E-liquid composition plays a large role, especially the use of artificial sweeteners like sucralose. These compounds do not fully vaporize; instead, they caramelize when exposed to heat, forming a sticky, dark coating on the heating element and wicking ports.
This caramel-like residue, or gunk, acts as an insulator, reducing the coil’s efficiency and hindering the wick’s ability to absorb fresh liquid. The coil must work harder to heat the liquid, leading to localized overheating of the cotton and a faster burnt taste. E-liquids high in vegetable glycerine (VG) also contribute because their thicker consistency slows wick absorption.
Another common cause of premature failure is continuous, rapid use, often called “chain vaping.” When puffs follow too quickly, the wicking material does not have sufficient time to fully re-saturate. Firing the device hits a partially dry wick, causing the cotton to scorch. Furthermore, operating a coil above the manufacturer’s recommended wattage generates excessive heat, which can instantly burn the wick.
Practical Steps for Maximizing Coil Life
Coil longevity can be extended by implementing simple, preventative measures, starting with installation. The most important step for any new coil is proper “priming,” which ensures the cotton wick is fully saturated before the first use. This involves applying several drops of e-liquid directly onto the exposed wicking ports and onto the top of the coil head.
After installing the primed coil and filling the tank, allow the coil to sit for five to ten minutes before firing the device. This resting period provides time for the wick to absorb the e-liquid completely from the tank. Skipping this step leads to an immediate, irreversible dry hit that permanently burns the wick.
Managing the device’s power output is a direct factor in coil endurance. When using a new coil, start vaping at the lower end of the wattage range printed on the coil head. Taking gentle puffs at this reduced power setting helps the coil break in gradually before increasing the wattage to the desired level.
Adopting a steady, paced style of puffing is essential for long-term coil health. Taking shorter, spaced-out draws gives the wicking material a chance to replenish its e-liquid supply between firings. Never allow the e-liquid level to drop below the visible wicking holes on the side of the coil head, as exposed ports prevent liquid draw and cause a dry wick.
The Coil Replacement Procedure
Replacing a spent coil is a straightforward process. First, detach the tank or pod from the battery section and empty any remaining e-liquid. Draining the tank prevents spills when the coil is removed.
Depending on the tank design, the coil is either unscrewed from the base or chimney section or pulled out if it uses a push-fit system. Discard the old coil and wipe the tank components clean of residue. The replacement coil must be primed thoroughly with e-liquid before being installed.
After the new coil is securely fitted, reassemble the tank, ensuring all seals are correctly positioned to prevent leaks. Refill the tank and reattach it to the device. Before taking the first puff, allow the device to stand for a few minutes, giving the newly installed coil time to fully saturate.