How can I get more vapour?
To produce more vapor, choose an e-liquid high in Vegetable Glycerin (VG), ideally with a 30/70 or 20/80 ratio. Open your airflow to the maximum to cool the coil and gradually increase your mod's wattage while staying within the recommended range. A long, direct lung hit will saturate the air with dense clouds without putting undue strain on your equipment.
Vapor production depends on the amount of liquid vaporized instantly. VG is very viscous and evaporates into a thick fog, unlike PG which is much thinner. By opening the airflow, you introduce more oxygen, which promotes vapor condensation. However, be careful: using too much power without enough airflow could burn your cotton and ruin the experience.