A method to clean a filter assembly in a laundry dryer, wherein the laundry dryer comprises: o a cabinet; o a drum rotatably supported in the cabinet; o a duct defining a flow passage for process air exiting the drum; o a filter assembly (80, 80', 90); o said cabinet including a seat to house said filter assembly, said seat being positioned downstream said drum in the flowing direction of the process air and said filtering assembly being positioned at least partially in the duct so as to filter process air flowing therein; o said filter assembly including (80, 80', 90): ▪ a frame having a first and a second end portions and defining, at the first end portion thereof, a storage portion adapted to store filtered material for several drying cycles without being emptied; ▪ a filter (116, 118) supported by the frame and defining a first filtering surface; ▪ a cleaning device for cleaning the first filtering surface including a translatable wiper to wipe the first filtering surface, said cleaning device including a manually operable handle which is connected to the wiper and movable from a first configuration wherein the manually operable handle is substantially completely housed in said seat, to a second configuration; the method comprising: o providing in a first position said manually operable handle in said first configuration; o moving said manually operable handle in the second configuration where it protrudes from said seat before translating the wiper from said first position wherein the wiper is located at the second end portion of said frame towards the first end portion of the frame by operating said manually operable handle; o wiping said first filtering surface by means of said wiper during translating so as to move filtered material attached to said first filtering surface towards the first end portion of the frame; and o collecting said filtered material in said storage portion; o removing said filter assembly (80, 80', 90) from said seat in order to remove said filtered material from said storage portion. o a cabinet; o a drum rotatably supported in the cabinet; o a duct defining a flow passage for process air exiting the drum; o a filter assembly (80, 80', 90); o said cabinet including a seat to house said filter assembly, said seat being positioned downstream said drum in the flowing direction of the process air and said filtering assembly being positioned at least partially in the duct so as to filter process air flowing therein; o said filter assembly including (80, 80', 90): ▪ a frame having a first and a second end portions and defining, at the first end portion thereof, a storage portion adapted to store filtered material for several drying cycles without being emptied; ▪ a filter (116, 118) supported by the frame and defining a first filtering surface; ▪ a cleaning device for cleaning the first filtering surface including a translatable wiper to wipe the first filtering surface, said cleaning device including a manually operable handle which is connected to the wiper and movable from a first configuration wherein the manually operable handle is substantially completely housed in said seat, to a second configuration; ▪ a frame having a first and a second end portions and defining, at the first end portion thereof, a storage portion adapted to store filtered material for several drying cycles without being emptied; ▪ a filter (116, 118) supported by the frame and defining a first filtering surface; ▪ a cleaning device for cleaning the first filtering surface including a translatable wiper to wipe the first filtering surface, said cleaning device including a manually operable handle which is connected to the wiper and movable from a first configuration wherein the manually operable handle is substantially completely housed in said seat, to a second configuration; o providing in a first position said manually operable handle in said first configuration; o moving said manually operable handle in the second configuration where it protrudes from said seat before translating the wiper from said first position wherein the wiper is located at the second end portion of said frame towards the first end portion of the frame by operating said manually operable handle; o wiping said first filtering surface by means of said wiper during translating so as to move filtered material attached to said first filtering surface towards the first end portion of the frame; and o collecting said filtered material in said storage portion; o removing said filter assembly (80, 80', 90) from said seat in order to remove said filtered material from said storage portion.