The diameter of the fiber cable core for transmitting communication optical signals is only 10 microns, and its energy density is very high. Even small dirt that is invisible to the naked eye may affect transmission performance, and if dirt gets on the fiber optical core, it may burn, and the heat may melt the core, causing communication accidents. In order to prevent communication accidents caused by such serious failures, it is necessary to clean the connectors with a fiber optic connector cleaner.