Dry Burning is a technique for cleaning used coils by simply firing your atomizer coil with no wick installed or liquid on the coil in order to burn off any residue that may have accumulated through use, in the hopes it will improve the flavor of the vape or allow the coil to last a little longer. Different coil materials respond in different ways to dry burning, while some respond well and come out almost new, others have little effect. Likewise different styles of coil can be effected differently and dry burning may add a lot to the life of your coil, it may also do little to extend the life.
The effectiveness of dry burning is also dependent on the age of the coil, frequency of use and amount of time it has sat with soaking in e-liquid with the old wick. Deciding whether or not dry burning is for you or for your coil type and style is a trial and error exercise, but can be a worthwhile tool to have in your repertoire of techniques for cleaning and general upkeep.
Dry burning should always be done with extreme caution by someone who understands what they’re doing and how to do it safely without risking burning themselves or damaging the batter or mod. It shouldn’t be attempted by anyone who isn’t comfortable with ohm’s law and building coils in general. Every time you dry burn should also be treated as a chance to check the health of your coils themselves, ensuring they heat evenly without forming hot spots.