| No vapor and no indicator light |
Depleted internal battery, defective device, or failed draw sensor |
The device remains completely inactive when inhaling gently through the mouthpiece. |
Do not open or modify the device. If it is rechargeable, use only the intended charging method. Otherwise, replace or recycle it according to local battery-waste rules. |
Low |
High |
| Indicator light activates, but no vapor is produced |
Blocked airflow, dry heating element, or an internal connection problem |
The light responds to a draw, but the airflow feels restricted or vapor production is absent. |
Check that the mouthpiece and air inlets are unobstructed. Wipe the exterior with a dry cloth. Do not insert sharp objects or disassemble the device. |
Low |
Medium |
| Very tight draw or almost no airflow |
Blocked mouthpiece or covered air inlet |
Air does not pass normally, and the device may activate intermittently. |
Remove any removable packaging, stickers, or debris around the mouthpiece and base. Keep fingers away from the air inlets while inhaling. |
Low |
Medium |
| Weak vapor with a burnt or harsh taste |
Low e-liquid level or an overheated, saturated-wick system |
Vapor becomes noticeably thinner and the taste remains burnt after a short pause. |
Stop using it. Disposable devices are not designed for e-liquid refilling or coil replacement. Replace the device if the problem persists. |
Low |
High |
| Device works only when inhaling very hard |
Partially blocked airflow or a sensitive draw-activated sensor |
A gentle, steady draw does not activate the device, while excessive suction may trigger it. |
Use a gentle, steady draw and confirm that the airflow path is clear. Avoid forceful inhalation, which can increase liquid leakage or irritation. |
Low |
Medium |
| Device stopped working after being stored in a cold place |
Reduced battery performance and thicker e-liquid caused by low temperature |
The issue appears after exposure to cold conditions and improves slowly at room temperature. |
Let the device return naturally to room temperature before checking it. Do not use direct heat, a microwave, or an open flame. |
Low |
Medium |
| Device activates by itself or becomes unusually hot |
Electrical malfunction, damaged battery, or automatic-firing fault |
The device produces vapor without inhalation, heats rapidly, swells, leaks heavily, or makes unusual sounds. |
Stop using it immediately. Move it away from flammable materials if safe to do so, avoid contact with leaking liquid, and follow local hazardous-battery disposal guidance. |
Low |
Critical |
| Liquid is visible in the mouthpiece or leaking from the device |
Overfilling, seal damage, condensation, or physical damage |
Moisture or e-liquid collects around the mouthpiece, airflow openings, or exterior shell. |
Stop using it and avoid swallowing or skin contact with the liquid. Wash exposed skin with soap and water and dispose of the device safely. |
Low |
High |
| Device is new but does not produce vapor |
Manufacturing defect, inactive battery, or packaging material still blocking airflow |
The device fails during the first few draws despite correct handling. |
Check for protective seals or plugs without opening the device. If it still fails, stop testing it and contact the seller or dispose of it safely. |
Low |
Medium |