Recognising and avoiding dry hits - guide to causes and care

A dry hit is a puff on an e-cigarette where the cotton in the coil is no longer sufficiently saturated with e-liquid. The heating coil then heats dry or partially dried-out cotton, which burns immediately. The result is a sharp, bitter vapour that tastes of burnt paper – unmistakable and unpleasant.

Technically, a distinction is made between a mild dry hit (the cotton dries out partially, the flavour becomes thin and slightly charred) and a full dry hit, where the cotton visibly chars. A dry hit is not the same as a so-called burnt hit caused by a faulty coil: it is almost always caused by an imbalance between the e-liquid that has been vaped and the e-liquid flowing in. With sub-ohm vapes featuring resistances below 1.0 ohms, it occurs more quickly than with MTL setups because more power is involved.

The causes of a burnt taste can be divided into a few main scenarios. If you know them, you can spot the risk even before taking your first puff.

Wattage too high for the coil

Every coil has a recommended power range, which is usually printed directly on the top (e.g. 0.4 ohms | 25–40 W). If you vape consistently at the upper limit or above, the e-liquid evaporates faster than the cotton can absorb it. The result: burnt cotton, broken coil.

Puffs that are too fast or too long

If you take a ten-second draw or chain-vape without a break, the cotton has no time to re-saturate. This becomes a particular problem with high-viscosity VG e-liquids (70/30 or 80/20).

Wrong e-liquid or empty tank

A liquid with a high VG content flows more slowly through the wicking holes. If the tank level is low and the wicking holes are exposed, no liquid reaches the cotton. Even a freshly replaced coil that hasn’t been prepared correctly often leads to a burnt taste on the first puff.

With a few simple routines, the problem becomes the exception. These points cover the most common sources of error:

• Always prime the coil: Before inserting a new atomiser head, saturate the visible cotton directly with 4–6 drops of e-liquid and then let it soak for 5–10 minutes in the filled tank. This ensures the cotton is fully saturated before power is applied.
• Keep the wattage within the recommended range: Start at the lower end of the printed range and increase in 2-watt increments. As soon as the flavour changes, reduce the wattage immediately.
• Do not let the tank run below a third: if the liquid level drops below the wicking holes, the cotton will no longer absorb any liquid. Top up before it becomes critical.
• Pauses between puffs: 10–15 seconds is usually enough for fresh e-liquid to soak into the cotton – particularly with VG-heavy short fills.
• Change the coil in good time: After 7–14 days or when the flavour noticeably diminishes. A worn-out coil is more likely to produce dry hits because the cotton has already become compacted by residue.

Also bear in mind the ambient temperature: in winter, e-liquid becomes thicker. If you leave the pod in a cold car overnight, you should warm it up before taking your first puff and wait a moment.

Is a dry hit dangerous?

A single dry hit is unpleasant but not an immediate health risk. However, regularly inhaling burnt wadding is not recommended as it produces thermal decomposition products. If you taste a burnt flavour: stop immediately and check the coil.

Why does it taste burnt even though the tank is full?

This is usually down to the coil itself: incorrect priming, too high a wattage or a coil head that has already worn out. Clogged wicking channels caused by sweet e-liquids with a high sugar content are also a common cause.

Can burnt cotton be salvaged?

No. Once the cotton has charred, the bitter taste remains in the material. The coil must be replaced. With rebuildables, you can re-wrap the cotton; the wire itself can often still be used after a short dry burn.

Are disposable vapes also affected?

Yes, though less frequently, as they are factory-calibrated. Towards the end of their lifespan, however, when the e-liquid is running low, dry hits typically occur – this is the signal that the device should be disposed of correctly.

A dry hit is almost always avoidable if the coil, power setting and e-liquid are compatible and you give your atomiser time to prime. Priming, a moderate wattage and regular coil changes are the three most important ways to prevent a burnt taste. If your current atomiser head frequently delivers burnt-tasting puffs, it’s often worth taking a look at suitable replacement models: in our selection of coils and atomiser heads, you’ll find options for every setup – from a smooth MTL draw to a powerful sub-ohm setup.