A system for cleaning at least one optical fiber end face with a mixture of positively pressurized air and a cleaning fluid, the system configured to be coupled to an optical fiber connector that supports the at least one optical fiber end face, the system comprising: a spray nozzle including: a housing body having a first end portion and a second end portion, a discharge passage for carrying the mixture from the first end portion to a discharge opening in the second end portion, and a return passage extending at least partially in the second end portion, and a spray nozzle coupling element at the first end portion; and a manifold including: a manifold coupling element configured to mate with the spray nozzle coupling element at the first end portion of the housing body, an air supply passage adapted to be coupled to a source of positively pressurized air, the supply passage communicating with the discharge passage of the housing body, and a vacuum passage (70, 72) adapted to be coupled to a source of vacuum pressure and communicating with the return passage of the housing body, wherein: the return passage of the housing body is configured to communicate with the discharge passage along a first fluid flow path proximate the second end portion for receiving the mixture after the mixture passes through the discharge opening, and the return passage of the housing body is configured to communicate with the discharge passage along a second fluid flow path proximate the first end portion for diverting a portion of the mixture from the air supply passage of the manifold to the vacuum passage and thereby control an amount of the mixture being directed to the discharge opening. a spray nozzle including: a housing body having a first end portion and a second end portion, a discharge passage for carrying the mixture from the first end portion to a discharge opening in the second end portion, and a return passage extending at least partially in the second end portion, and a spray nozzle coupling element at the first end portion; and a housing body having a first end portion and a second end portion, a discharge passage for carrying the mixture from the first end portion to a discharge opening in the second end portion, and a return passage extending at least partially in the second end portion, and a spray nozzle coupling element at the first end portion; and a manifold including: a manifold coupling element configured to mate with the spray nozzle coupling element at the first end portion of the housing body, an air supply passage adapted to be coupled to a source of positively pressurized air, the supply passage communicating with the discharge passage of the housing body, and a vacuum passage (70, 72) adapted to be coupled to a source of vacuum pressure and communicating with the return passage of the housing body, wherein: the return passage of the housing body is configured to communicate with the discharge passage along a first fluid flow path proximate the second end portion for receiving the mixture after the mixture passes through the discharge opening, and the return passage of the housing body is configured to communicate with the discharge passage along a second fluid flow path proximate the first end portion for diverting a portion of the mixture from the air supply passage of the manifold to the vacuum passage and thereby control an amount of the mixture being directed to the discharge opening. a manifold coupling element configured to mate with the spray nozzle coupling element at the first end portion of the housing body, an air supply passage adapted to be coupled to a source of positively pressurized air, the supply passage communicating with the discharge passage of the housing body, and a vacuum passage (70, 72) adapted to be coupled to a source of vacuum pressure and communicating with the return passage of the housing body, wherein: the return passage of the housing body is configured to communicate with the discharge passage along a first fluid flow path proximate the second end portion for receiving the mixture after the mixture passes through the discharge opening, and the return passage of the housing body is configured to communicate with the discharge passage along a second fluid flow path proximate the first end portion for diverting a portion of the mixture from the air supply passage of the manifold to the vacuum passage and thereby control an amount of the mixture being directed to the discharge opening. the return passage of the housing body is configured to communicate with the discharge passage along a first fluid flow path proximate the second end portion for receiving the mixture after the mixture passes through the discharge opening, and the return passage of the housing body is configured to communicate with the discharge passage along a second fluid flow path proximate the first end portion for diverting a portion of the mixture from the air supply passage of the manifold to the vacuum passage and thereby control an amount of the mixture being directed to the discharge opening.