If the battery provides too much voltage, the coil may convert too much liquid into vapor and result in auto-firing. You can confirm whether the voltage is the culprit by counting the number of puffs per battery. Getting one or two puffs per charge means the battery is sending too much voltage to the coils.

If your Elf Bar (or any disposable vape) continues to fire after you stop puffing—a phenomenon known as "auto-firing"—it is usually caused by a malfunctioning airflow sensor. Inside the device, a sensitive membrane detects the change in pressure when you inhale; if e-liquid leaks into this sensor or if condensation from the vapor builds up, the sensor can get "stuck" in the active position. Other causes include a low battery sending irregular signals to the circuit board or physical damage from dropping the device. In 2026, many users attempt to fix this by gently blowing into the charging port to clear the sensor or tapping the device on a flat surface to dislodge the membrane. However, auto-firing can cause the coil to overheat and burn the cotton wick, leading to a nasty "burnt" taste. Because this can also lead to the battery overheating, the safest move is to stop using the device and dispose of it at a designated battery recycling point.