The disclosure relates to an application system for applying an application agent (e.g. sealant) to a component (e.g. motor vehicle body component). The application system according to the disclosure comprises an applicator with at least one nozzle, a supply line for supplying the applicator with the application agent, a sensor which measures a measured variable in the supply line to the applicator or in the applicator and supplies a corresponding sensor signal, and a monitoring unit which is connected to the sensor and evaluates the sensor signal of the sensor. The disclosure provides that the monitoring unit recognizes, by evaluating the sensor signal, whether one of the nozzles of the applicator shows a creeping nozzle clogging.