Watch on HDtoday. “The Nightcleaners” is set in the context of the campaign (1970-1972) to unionize the women who cleaned office blocks at night and were being victimized and underpaid. Intending at the outset to make a campaign film, the Collective was forced to turn to new forms in order to represent the forces at work between the cleaners, the Cleaner's Action Group and the Unions - and the complex nature of the campaign itself.