Laundry treatment apparatus, in particular dryer, condensate dryer, heat pump tumble dryer or washing machine having a dryer function, the apparatus comprising: a control unit for controlling the operation of the laundry treatment apparatus, an apparatus cabinet, a laundry treatment chamber for treating laundry using process air, a process air circuit for circulating the process air, a heat exchanger arranged in the process air circuit for cooling the process air and condensing humidity from the process air, a condensate collector assigned to the heat exchanger for collecting condensate condensed at the heat exchanger, a fluff filter arranged in the process air circuit upstream the heat exchanger for filtering fluff from the process air passing the fluff filter, and a condensate pump in liquid connection to the condensate collector and being adapted to convey the condensate to the fluff filter for washing at least a portion of the filter surface by removing fluff, characterized by a washing liquid collector assigned to the fluff filter and being adapted to collect washing liquid from the fluff filter, and a drain pump in liquid connection to the washing liquid collector to convey the contaminated washing liquid to a drain outlet for draining the contaminated washing liquid to a contaminated washing liquid sink, wherein the washing liquid collector is separate from the condensate collector, such that there is no fluid connection between the condensate collector and the washing liquid collector, and wherein the fluff filter and the washing liquid collector are arranged such that the washing liquid flows along at least a portion of the surface of the fluff filter and carries fluff washed off from the surface into the washing liquid collector which is adapted to collect the washing liquid contaminated with fluff. a control unit for controlling the operation of the laundry treatment apparatus, an apparatus cabinet, a laundry treatment chamber for treating laundry using process air, a process air circuit for circulating the process air, a heat exchanger arranged in the process air circuit for cooling the process air and condensing humidity from the process air, a condensate collector assigned to the heat exchanger for collecting condensate condensed at the heat exchanger, a fluff filter arranged in the process air circuit upstream the heat exchanger for filtering fluff from the process air passing the fluff filter, and a condensate pump in liquid connection to the condensate collector and being adapted to convey the condensate to the fluff filter for washing at least a portion of the filter surface by removing fluff, characterized by a washing liquid collector assigned to the fluff filter and being adapted to collect washing liquid from the fluff filter, and a drain pump in liquid connection to the washing liquid collector to convey the contaminated washing liquid to a drain outlet for draining the contaminated washing liquid to a contaminated washing liquid sink, wherein the washing liquid collector is separate from the condensate collector, such that there is no fluid connection between the condensate collector and the washing liquid collector, and wherein the fluff filter and the washing liquid collector are arranged such that the washing liquid flows along at least a portion of the surface of the fluff filter and carries fluff washed off from the surface into the washing liquid collector which is adapted to collect the washing liquid contaminated with fluff.