A method, performed by a control device, for cleaning an evaporative humidifier and cooler apparatus for humidification and cooling of air, the apparatus comprises: a cooling and humidification media, which is configured to receive and evaporate a fluid; a fluid distribution element, which is configured to distribute the fluid to the cooling and humidification media; and a tray arranged to collect fluid downstream of the cooling and humidification media; wherein the fluid distributed by the fluid distribution element is collected from the tray; wherein the method comprises: determining the condition of the cooling and humidification media based on data from a sensor device arranged in fluid communication with the fluid downstream of the cooling and humidification media; characterized in that the method further comprises: supplying at least one cleaning fluid (12; 14) to the cooling and humidification media dependent on the condition of the cooling and humidification media, wherein supplying the at least one cleaning fluid (12; 14) to the cooling and humidification media comprises supplying a first cleaning fluid when the cooling and humidification media has a condition requiring de-scaling of the cooling and humidification media and/or supplying a second cleaning fluid when the cooling and humidification media has a condition requiring disinfection of the cooling and humidification media. a cooling and humidification media, which is configured to receive and evaporate a fluid; a fluid distribution element, which is configured to distribute the fluid to the cooling and humidification media; and a tray arranged to collect fluid downstream of the cooling and humidification media; wherein the fluid distributed by the fluid distribution element is collected from the tray; wherein the method comprises: determining the condition of the cooling and humidification media based on data from a sensor device arranged in fluid communication with the fluid downstream of the cooling and humidification media; characterized in that the method further comprises: supplying at least one cleaning fluid (12; 14) to the cooling and humidification media dependent on the condition of the cooling and humidification media, wherein supplying the at least one cleaning fluid (12; 14) to the cooling and humidification media comprises supplying a first cleaning fluid when the cooling and humidification media has a condition requiring de-scaling of the cooling and humidification media and/or supplying a second cleaning fluid when the cooling and humidification media has a condition requiring disinfection of the cooling and humidification media. determining the condition of the cooling and humidification media based on data from a sensor device arranged in fluid communication with the fluid downstream of the cooling and humidification media; characterized in that the method further comprises: supplying at least one cleaning fluid (12; 14) to the cooling and humidification media dependent on the condition of the cooling and humidification media, wherein supplying the at least one cleaning fluid (12; 14) to the cooling and humidification media comprises supplying a first cleaning fluid when the cooling and humidification media has a condition requiring de-scaling of the cooling and humidification media and/or supplying a second cleaning fluid when the cooling and humidification media has a condition requiring disinfection of the cooling and humidification media.