The coils of your vape are essentially the heart of the device, which heat the e-liquid to produce the vapor. A coil basically consists of metal wire and cotton wicking that absorbs the e-liquid. In due time, coils wear down because of accumulation of residue, overheating, and general usage. Although coils are not built to last forever, one can easily follow proper steps in order to prolong their lives to save money and enhance their overall vaping experience.