A method, comprising: receiving, by a device for cleaning an end face of an optical fiber, a first pressure signal from a first pressure sensor, wherein the device includes a pneumatic circuit, wherein the pneumatic circuit includes: a pressure supply port for receiving an input air flow, a pressure output port for providing an output air flow for cleaning the end face of the optical fiber, one or more circuit components, the first pressure sensor, and a second pressure sensor; receiving, by the device, a second pressure signal from the second pressure sensor; determining, by the device and based on the first pressure signal and the second pressure signal, whether a pressure difference across a circuit component, of the one or more circuit components, satisfies a first threshold; causing, by the device and based on the pressure difference across the circuit component not satisfying the first threshold, a message to be displayed to a user specifying the circuit component; and performing, by the device and based on the pressure difference across the circuit component not satisfying the first threshold, one or more actions, wherein the one or more actions include: causing one or more valves (126, 128) in the pneumatic circuit to close, causing the one or more valves (118, 126) in the pneumatic circuit to open, or causing a pressure regulator in the pneumatic circuit to be adjusted. receiving, by a device for cleaning an end face of an optical fiber, a first pressure signal from a first pressure sensor, wherein the device includes a pneumatic circuit, wherein the pneumatic circuit includes: a pressure supply port for receiving an input air flow, a pressure output port for providing an output air flow for cleaning the end face of the optical fiber, one or more circuit components, the first pressure sensor, and a second pressure sensor; a pressure supply port for receiving an input air flow, a pressure output port for providing an output air flow for cleaning the end face of the optical fiber, one or more circuit components, the first pressure sensor, and a second pressure sensor; receiving, by the device, a second pressure signal from the second pressure sensor; determining, by the device and based on the first pressure signal and the second pressure signal, whether a pressure difference across a circuit component, of the one or more circuit components, satisfies a first threshold; causing, by the device and based on the pressure difference across the circuit component not satisfying the first threshold, a message to be displayed to a user specifying the circuit component; and performing, by the device and based on the pressure difference across the circuit component not satisfying the first threshold, one or more actions, wherein the one or more actions include: causing one or more valves (126, 128) in the pneumatic circuit to close, causing the one or more valves (118, 126) in the pneumatic circuit to open, or causing a pressure regulator in the pneumatic circuit to be adjusted. causing one or more valves (126, 128) in the pneumatic circuit to close, causing the one or more valves (118, 126) in the pneumatic circuit to open, or causing a pressure regulator in the pneumatic circuit to be adjusted.