The present disclosure relates to a skin treatment device (40) for a grooming appliance (10, 110). The skin treatment device comprises a flow generating unit (50, 150) arranged to generate a flow of ambient air, and a fluid reservoir (52) arranged to receive and gradually dispense a treatment liquid. The fluid reservoir (52) comprising an absorbent substance (76) and a liquid receiving storage (74) formed from the absorbent substance (76). The liquid receiving storage (74) is arranged to absorb a liquid. When the device is operated, the flow generating unit (50, 150) is generates a flow that entrains an evaporated fraction of the treatment liquid stored in the reservoir unit and propels the flow against a treatment skin portion of a user.