Continuing our commitment for unbiased research on e-cigarettes, we are now launching a new campaign for what we consider to be THE MOST IMPORTANT aspect in e-cigarette safety and future development: TEMPERATURE OF EVAPORATION. Although e-cigarettes do not combust any material, heat is necessary to generate the vapor (aerosol) which is subsequently inhaled by the users. This can result in thermal decomposition of some e-cigarette ingredients, releasing potentially toxic chemicals (most commonly aldehydes, such as formaldehyde, acetaldehyde and acrolein). Until now, no study has systematically evaluated temperatures inside the wick, while we have observed several methodological mistakes in assessing aldehydes release (e.g. ingoring that higher wattage is associated with less puff duration in realistic use). Our team has initiated this research, and has already completed preliminary experiments evaluating temperature of evaporation in realistic settings, by introducing a sensor inside the wick, and by having the atomizer fully assembled and used by a vaper.