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Wartung & Pflege

Spit back with e-cigarettes - causes and countermeasures

Spit back on the vaporiser: Why liquid sprays, how to prevent spitting on the e-cigarette and which coils, wattages and winding technique can help.

Spitback is one of the most common annoyances when vaping: instead of a smooth draw, you feel small, hot drops of e-liquid on your tongue or hear a crackling sound in the mouthpiece. The phenomenon is harmless but unpleasant, and very hot drops can even cause minor burns to the lips. The good news is that spit back can almost always be managed with the right settings, the correct coil and careful handling. Below, you’ll find out how spit back occurs in a vape, what factors contribute to it and what specific steps you can take to prevent it.

Spit back refers to the effect where liquid does not fully vaporise when you take a drag, but is instead flung back into the mouthpiece in small droplets through the vapouriser’s chimney. A characteristic feature is the brief ‘pop’ or ‘crack’ sound that occurs when a droplet of liquid explosively turns into vapour on the hot coil.

It is important to distinguish this from two other phenomena: flooding describes a saturated coil that gurgles and produces hardly any vapour. Leaking is liquid escaping from the outside of the atomiser. Spitback, on the other hand, occurs inside – that is, between the coil and the drip tip – and only manifests when taking a puff. In all three cases, there is too much liquid in the wrong place, but the causes and remedies differ.

Spitback always occurs when there is more e-liquid on the coil than it can vapourise cleanly per puff. There are several typical triggers for this.

Too much liquid on the coil

Freshly filled drippers, overfilled tanks or cotton wadding packed too loosely simply contain too much liquid. The coil first heats the surrounding droplets before it can start to vapourise – the result is a spitting atomiser.

Incorrect power-to-coil ratio

If a 0.15-ohm sub-ohm coil is operated at just 25 watts, there isn’t enough power to vapourise the entire amount of e-liquid absorbed. The opposite scenario – very thin 50/50 e-liquid on a high-resistance MTL coil at high power – also frequently leads to spitting.

E-liquid composition

E-liquids with a high PG content or low viscosity flow through faster than thick 70/30 VG mixtures. This promotes spitback, particularly in sub-ohm vapes designed for thicker e-liquids.

With a few adjustments, you can reliably get spitback under control:

  • Adjust the power: Increase the wattage in 2-watt increments until the crackling stops. Stay within the coil’s manufacturer-specified range (e.g. 60–80 W).
  • Take the first few puffs carefully: After changing the coil or leaving the device idle for a long time, take two or three short, gentle puffs at a reduced power setting first, so that any excess e-liquid is distributed evenly.
  • Choose the right coil: For MTL draws, coils from 1.0 ohms with a denser wick are suitable; for DL draws, mesh or sub-ohm coils with a larger evaporation surface are recommended.
  • Drip tip with anti-spitback: Curved or ribbed mouthpieces slow down droplets before they reach the mouth. Many modern tanks already come with such drip tips.
  • Open the airflow: A slightly wider airflow helps carry droplets more effectively in the vapour stream. If the airflow is too restricted, moisture concentrates in the chimney.
  • Match the e-liquid to the coil: For sub-ohm atomisers from 0.5 ohms downwards, VG-heavy e-liquids (70/30 or 80/20) are significantly better suited than thin 50/50 mixtures.

Another tip: regularly turn the device horizontally and gently tap the drip tip downwards onto a kitchen towel. This allows excess e-liquid to drip out of the chimney before you take another puff.

Is spitback dangerous?

Generally speaking, no – it’s unpleasant, but harmless. However, very hot droplets can cause a brief burning sensation. If you regularly get hit by hot splashes, reduce the wattage or switch to a drip tip with anti-spitback geometry.

Why is my new coil spitting straight away?

New coils are often generously pre-soaked with e-liquid at the factory. Before first use, apply just a few drops directly onto the cotton, let the coil sit for five minutes and start with a reduced wattage.

Does a different e-liquid help with spitback?

Yes, often noticeably so. Switching from 50/50 to 70/30 VG reduces dripping and thus spitback at the atomiser, particularly with sub-ohm setups. Ensure the e-liquid is thoroughly mixed and has had sufficient time to mature.

Why does the e-cigarette spit only on the first puff?

After breaks, condensation builds up in the chimney. A quick dry puff without firing or a gentle first puff at low power almost always solves the problem.

Spitback is not a fault, but a sign that the coil, power and e-liquid are not yet working together optimally. With the correct wattage, suitable coil wrap and a liquid that suits the atomiser, the spitback usually disappears within a few puffs. If you want to tailor your setup specifically to your vaping style, it’s worth taking a look at our selection of coils and atomiser heads, as well as the matching liquids – this way you’ll find the combination that vapes cleanly and reliably.

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