An apparatus and method of manufacturing the apparatus is provided. The apparatus comprises a first transducer (107) and a first tank. The first transducer (107) is adapted to transmit ultrasonic waves of a first wavelength into the first tank (101). The first tank (101) is configured to establish a substantially standing ultrasonic wave pattern of the ultrasonic waves inside the first tank (101). A disposer (109.1, 109.2) adapted to dispose a textile (131) into the first tank (101) is provided. The disposer (109.1, 109.2) disposes the textile (131) into the first tank at a first distance from the first transducer (107). The first distance is determined based the first wavelength.