Before you head to the gate, slip your vaporizer into an inner pocket. Body heat will bring it up to a comfortable temperature. If you’re already at the gate and it feels cold, just hold it in your closed hand for two or three minutes. You’re not trying to heat it up drastically—just taking the chill off.

Once it’s warm, take a slow, gentle draw. Resist the urge to pull hard. A slow draw gives the material time to vaporize evenly, which reduces harshness. You can also open the airflow fully to make the pull easier. Some people prefer a tighter draw, but in cold weather, a wider opening compensates for the thicker material.