When to change your coil or pod: the signs, and how to swap

A coil does not usually die suddenly. It fades. Over a few days the flavour gets muted, the vapour thins and a faint scorched note creeps in at the end of each puff. By the time it tastes properly burnt, it has been past its best for a while.

The comparison below shows the difference between a coil in good health and one that has had it. If you recognise two or more signs from the right-hand column, change it now rather than squeezing out another fill. Running a dying coil only makes the burnt taste worse and can leave a scorched flavour lingering in the pod.

There are two ways a coil tells you it is done, and they need different responses. A sudden burnt hit on a coil that tasted fine yesterday is often a dry wick: the liquid level dropped or you chain vaped. Sometimes the coil survives that if you refill and wait, but often it does not.

A slow fade over several days is the coil simply wearing out, usually as sweeteners build up on the cotton. That one will not come back. Tap the pattern that matches yours to see what to do. If yours keeps burning early, our guide to pod life lists the usual causes.

Ask around and you will hear anything from three days to a fortnight. Both are true: coil life depends on how much you vape, how sweet your liquid is, how hard you run the power and whether you let it run dry. A light menthol vaper at modest power can get two weeks. A heavy dessert vaper might need a new coil every few days.

Packs reflect that. Uwell Caliburn G coils come in fours, Smok Nord coils in fives, and either pack lasts most daily vapers about a month. Knowing your own rhythm means you can reorder before the last one goes.

The most common way to ruin a new coil is to fire it straight away. New cotton is dry, and a dry wick scorches in a single puff. Priming takes five minutes and saves the coil.

The steps below work for push-in coils in pod systems and screw-in coil heads in tanks. If your device uses refillable pods with built-in coils, skip straight to filling the new pod and letting it sit. Either way, a few gentle draws without firing before the first real puff help pull liquid into the cotton. Browse our full range of replacement coils if you need to restock.

In a tank setup, the coil head sits at the base of the glass, screwed into the 510 connection that links to the mod. Liquid reaches it through side holes, which is why the liquid level matters: once it falls below those holes, the cotton dries out quickly.

In pod kits, the coil is either a small push-in unit at the bottom of the pod or built into the pod itself. Either way, the principle is the same. Keeping the reservoir at least a third full and not tilting the device for long periods both help the coil stay wet. Cleaning the pod and contacts between changes, covered in our cleaning guide, also helps.

A last question on the most important habit in this guide. Get this one right and you will save more coils than every other tip combined, because the commonest way a coil dies is in its first minute of use, not its last.

Choose an answer and read the reason underneath. If you are ever unsure in real life, err on the side of waiting longer. Five extra minutes of soaking never hurt a coil, but one puff too soon can finish it before you have tasted a single proper hit of your liquid.