Abstract: In an apparatus for cleaning a soiled film in which the soiled film is passed upwardly through a wet cleaning station wherein a liquid cleaning agent is applied to the soiled film by means of wick plates which are pressed against the film from opposite sides and which extend downwardly into a liquid cleaning agent storage chamber from which they draw cleaning agent for wetting the film, the capillary flow of liquid cleaning agent to the film is finely adjustable by pressure panels engaging the wick plates with the upper edges of the storage chamber so as to provide for a wick plate low cross-section restriction adjacent the upper edges of the storage chamber which is finely adjustable or accurately controlling the cleaning agent supply to the soiled film.