Method for operating an extractor hood device, wherein the extractor hood device comprises a housing which at least partially forms a flow channel for guiding an air flow, and wherein the flow channel has an inlet opening which is designed to be arranged facing a vapour source, and wherein the flow channel has an outlet opening which is designed to be arranged facing away from the vapour source, and at least one sorption filter which is arranged within the flow channel and is designed to absorb moisture from the air flow, and a fan which is arranged within the flow channel, preferably in the air flow upstream of the sorption filter, and is designed to generate and/or amplify the air flow, and a control unit which is designed to control the fan of the extractor hood device, and wherein the extractor hood device is free of a device for generating thermal energy, characterised in that the moisture generated above the cooking hob is detected by the control unit of the extractor hood device, at least during normal operation, and stored as a value for the moisture generated momentarily and/or over time, and the extractor hood device is put into a drying operation by the control unit depending on a predetermined point in time which is specified by the user, wherein the control unit operates the fan during the drying operation for a period of time specified by the user; and/or the extractor hood device is put into a drying operation by the control unit depending on a predetermined time interval from the last operation of the extractor hood device by the user, wherein the time interval is specified by the user, and wherein the control unit operates the fan during the drying operation for a period of time specified by the user. wherein the extractor hood device comprises a housing which at least partially forms a flow channel for guiding an air flow, and wherein the flow channel has an inlet opening which is designed to be arranged facing a vapour source, and wherein the flow channel has an outlet opening which is designed to be arranged facing away from the vapour source, and at least one sorption filter which is arranged within the flow channel and is designed to absorb moisture from the air flow, and a fan which is arranged within the flow channel, preferably in the air flow upstream of the sorption filter, and is designed to generate and/or amplify the air flow, and a control unit which is designed to control the fan of the extractor hood device, and wherein the extractor hood device is free of a device for generating thermal energy, characterised in that the moisture generated above the cooking hob is detected by the control unit of the extractor hood device, at least during normal operation, and stored as a value for the moisture generated momentarily and/or over time, and the extractor hood device is put into a drying operation by the control unit depending on a predetermined point in time which is specified by the user, wherein the control unit operates the fan during the drying operation for a period of time specified by the user; and/or the extractor hood device is put into a drying operation by the control unit depending on a predetermined time interval from the last operation of the extractor hood device by the user, wherein the time interval is specified by the user, and wherein the control unit operates the fan during the drying operation for a period of time specified by the user.