A vape that fires without you drawing or pressing anything can get hot fast, so make it safe first and diagnose second. The cause is usually liquid on an auto-draw sensor or a sticky fire button, both fixable.
The short version
- First: remove the pod or tank so the coil cannot heat, and set the device on a hard surface.
- Auto-draw kits misfire when liquid or condensation reaches the sensor.
- Button kits misfire when the button sticks with dried liquid or debris.
- Never charge a device that has been auto-firing until you know why.
Make it safe first
A coil firing continuously heats up quickly, and the battery works hard the whole time. Most devices have a cut-off that stops firing after around 8 to 10 seconds, but a device that keeps re-triggering can keep going.
Do the steps below in order. Use a cloth if the device already feels hot to the touch, and put it down on something that will not burn, like a ceramic tile or the kitchen sink, rather than a sofa or bed.
If the device is swelling, hissing, smoking or smells of burning plastic, leave it alone on that hard surface, keep away from it and do not attempt to charge or use it again.
- Remove the pod or tankWith no coil connected, nothing can heat.
- Put it on a hard surfaceA tile, sink or metal tray, away from anything flammable.
- Lock or switch offIf it has a lock or power button, use it.
- Let it coolLeave it alone until it is at room temperature.
- Do not charge itHold off charging until you have found the cause.
Auto-fire cause finder
Once it is safe, the type of kit you have points to the likely cause. Auto-draw kits use a pressure sensor; button kits use a switch. They fail in different ways.
Liquid is behind most auto-draw misfires. The sensor sits under the pod, so a leak or condensation that runs down the airflow lands right on it. It then reads a draw that is not happening.
If you cannot tell whether your kit is auto-draw or button-fired, look for a fire button on the body. No button usually means auto-draw only.
What kind of kit is it?
Liquid has reached the sensor. Remove the pod, dry the device with tissue, stand it upright for several hours and fix the leak before using it again.
Condensation may still be inside. Dry it for a day. If it misfires again with a dry pod, stop using it.
Dried liquid or debris is holding the switch down. See our stuck button guide and clean around it.
Possible internal damage. Do not charge it and do not keep using it.
Drying out a wet sensor
The sensor in an auto-draw kit reacts to tiny changes in air pressure. A film of liquid can trigger it or block it, which is why a leaky pod can cause both misfires and no firing at all.
With the pod removed, wrap a tissue round a cotton bud and dab inside the pod bay. Then stand the device upright, open end down, on a dry tissue so any liquid can drain out. Overnight is ideal.
Do not blast it with a hairdryer, which can push liquid deeper. When it is dry, fit a pod that does not leak and test it for a day before trusting it again. Our pod leaking guide stops it happening twice.
- 1Mouthpiece
- 2Pod and e-liquid window
- 3Coil
- 4Contacts and magnets
- 5Airflow
- 6Battery
- 7Fire button or auto-draw sensor
- 8USB-C charging port
When it is time to replace the kit
Some auto-firing is a sign of a fault that you should not try to fix yourself. If a device misfires after a full dry-out with a clean, non-leaking pod, the sensor or circuit board has a problem.
The same goes for any device that got hot enough to deform, discolour or smell. Batteries are built into most pod kits and are not user-replaceable, so a damaged one means the whole device is finished.
Disposable and rechargeable devices with lithium batteries should not go in household bins. Take them to a battery or electrical recycling point. A new vape kit is a far better bet than nursing a device you cannot trust.
Prevent it happening again
Auto-firing almost always traces back to liquid in the wrong place or a device being knocked around. A few habits keep both under control.
Carry button kits locked. Most lock with five quick presses of the fire button, which stops a pocket or bag pressing it for you. That one habit prevents a lot of hot pockets.
For auto-draw kits, the priority is keeping the pod dry and replacing it before it starts to leak. Check the base of the device every time you change pods. If a pod has been weeping, our pod leak guide will help, and if the kit ever took a dunking, read the wet vape guide before using it again.
Quick answers
Why does my vape fire on its own?
On auto-draw kits it is usually liquid on the sensor. On button kits it is usually a sticky button. Remove the pod or tank straight away and let it cool.
Is an auto-firing vape dangerous?
It can overheat, so treat it seriously. Remove the pod, place it on a hard surface and do not charge it until you know the cause.
Can I fix a vape that keeps auto-firing?
If drying the sensor or cleaning the button stops it, yes. If it misfires again with a dry, non-leaking pod, retire the device.
How do I lock my vape?
Most button kits lock with five quick presses of the fire button. Auto-draw kits often have no lock, so remove the pod if you need it safe.
