Aerosol-generating system (1000) comprising an aerosol-generating device (1100) comprising a heating element (1102), and a cartridge (1200) comprising a housing (1202), a wicking element (1204), and a biasing means (1206). The cartridge is engageable with, and disengageable from, the device. When the cartridge is not engaged with the device, the wicking element is in a disengaged wicking element position and is not in contact with the heating element. When the cartridge is engaged with the device, the wicking element is in an engaged wicking element position, different to the disengaged wicking element position relative to the housing, and is in contact with the heating element, and the biasing means biases the wicking element towards the disengaged wicking element position such that the wicking element applies a force to the heating element in a force direction non-parallel with the engagement direction.