How to clean LC optical fiber connector?

LC connector cleaning pen, what kind, alcohol? For optical fiber and optical cable, we generally use Finit fiber optic adapter (also known as flange), also known as optical fiber connector, which is the centering connection part of optical fiber movable connector. Series products include: fc.sc.st.lc.mtrj It is widely used in optical fiber distribution frame (ODF), optical fiber communication equipment and instruments. Excellent performance, stability and reliability.