The invention relates to an aerosol-generating system comprising a main unit (40) and a mouthpiece (10). The main unit comprises a main heating element (52) for heating an aerosol-forming substrate. The mouthpiece comprises a sensorial media (13) and an auxiliary heating element (12) for heating the sensorial media. The mouthpiece comprises an airflow path. The mouthpiece further comprises a guiding member (28) arranged in the airflow path of the mouthpiece. The guiding member is configured to guide liquid components condensed from the airflow in a direction towards the main heating element. The invention further relates to a mouthpiece for such an aerosol-generating system.