This is a common problem and usually caused by a flooded coil and/or a low-powered battery or a battery that is running low on power, and can also be caused by thinner juice, ie juice that is too thin for the coil in question. The coil is the heating part inside the tank.
See also our article about e-cig tank flooded which will give you a lot more detail about how the liquid ends up in your mouth if it can't turn into vapour fast enough.
Firstly you will need to clear your coil/tank parts of excess e-liquid:
1. Remove the tank from the battery - if filling from the bottom, take care to turn the tank sufficiently upside down to stop the liquid running out as you remove the battery
2. Wrap a paper towel around the battery end of the tank while its upside down and blow through the mouthpiece - again without turning it upright and spilling liquid
3. The excess liquid in the central air flow tube will come out onto the paper towel as you blow. You may need to blow a few times to ensure the tube is clear
Sometimes the coil in your tank may not lend itself very well to the juice blend you're using. For example, some of the thinnest eliquid is 80% PG, and even some standard coils will hiss and spit because the liquid is flooding into the coil and despite you pressing the fire button, it simply can't vaporise fast enough as it floods in, so all that excess just gets hot but doesn't go anywhere, apart from up the airflow tube towards the mouth.
To resolve, try a thicker juice, say 70% blend or 50% VG depending on what you're currently using. If you're sub-Ohm vaping see further down the page.
If you have airflow control, try reducing the amount of air that can pass through.
If you take quite long or deep inhales this can sometimes draw more liquid into the coil than it can handle, this can also happen if you have the airflow wide open.
Taking smaller inhales may help.
You can also reduce the airflow, but you will probably need to take bigger inhales to compensate.
Priming is the process where you ensure the coil (and its cotton or wicking material inside) it wet through before use, over priming is when it's too wet. Click here for our page about ecig priming.
If you have a variable device you may need to turn up the power, ie, if the coil is being fired below the level it’s designed for, say 14W, and you have your power output at 8W, it will struggle vaporise the liquid as the coil won't get hot enough. When you increase the power, the heat in the coil increases and in turn can vaporise the liquid. However, don't exceed the power range for the coil as that can result in burnt coils and burnt-tasting juice.
If you’re using a sub-Ohm coil and you’re getting liquid in the mouth, this example of what not to do with the likes of the Eleaf Melo, may prove helpful.
Firstly, ensure the power (ie the wattage or the voltage) is in the correct range for your coil.
In the case of the Melo 0.5 Ohm coils it’s probably circa 25W. The Melo is designed to match the Eleaf iStick 30W mod which has a range of 5-30W but if you set the wattage too low the liquid cannot vaporise, and instead it will gurgle away, perhaps get darker in colour, and you’ll end up with it in your mouth or seeping out wherever it can because it has nowhere else to go every time you press the fire button.
You also need to use a good quality e-liquid with more VG than PG (VG is thicker than PG and produces a lot more vapour).
Be aware that 6mg (0.6%) nicotine is probably an absolute maximum strength e-liquid to use with many sub-Ohm coils.
If you can’t take the hit from the increased vapour from the VG content of the e-liquid, turning the power down will cause more problems than it solves, instead you need to reduce the nicotine strength.
In addition to this, when you press the fire button you need to inhale directly into the lungs (“lung it”). Sub-Ohm vaping, which usually has a looser, more airy draw, is designed for direct lung inhale, as opposed to the more traditional mouth to lung inhale.
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