Aerosol-generating system providing preferential evaporation of nicotine

An aerosol-generating device, comprising:

• a heater assembly comprising at least one heating element;
• a reservoir configured to hold a liquid aerosol-forming substrate proximate to the heater assembly;
• a liquid delivery mechanism configured to deliver the liquid aerosol-forming substrate from the reservoir to the at least one heating element;
• a power supply configured to supply power to the heater assembly to generate an aerosol from the aerosol-forming substrate;
• a mouthpiece on which a user puffs to draw aerosol out of the aerosol-generating device;
• and
• control circuitry configured to
• control a supply of power to the heater assembly,
• supply a first power sufficient to maintain at least one heating element of the heater assembly at a first temperature or first temperature range, between user puffs, and
• supply a second power to at least one heating element of the heater assembly, the second power being sufficient to raise a temperature of at least one heating element of the heater assembly above the first temperature or first temperature range, during user puffs.