Canon 75-300 mm lens | Dust, fungus clean on front lens inside, disassemble, assemble easily

This video shows you front part disassebling. Maximum times the fungus or dust gather in the fron part of the lens. But if your lens is affected by fungus or dust in the back part then you have to disassemble the back part. But disassemble of back part is little bit different. Because there are some extra equipment like motor and other wire. So be carefull when you are going to disassemble the back part. if you note that fungus and dust on front lens inside then you can try this. thank you.