Generally, the device will not cause a leaking issue. The leaking issue is related to the cartridge, the liquid, and personal use habits.
If this problem happens with a new cartridge, I'm afraid the liquid you are using is not compatible with the cartridge.
We recommend 50:50 Salt Nic 20-50mg or pod-friendly freebase e-liquid for cartridges.
For both 0.4Ω and 0.6Ω cartridges, we recommend using pod-friendly freebase e-liquid.
For both 0.8Ω and 1.2Ω cartridges, we recommend using Salt Nic e-liquid.