1. First turn off the printer power switch and unplug the printer from the power socket.

2. Then open the flip cover of the printer, carefully remove the photosensitive drum assembly, and wipe its surface clean with absorbent cotton, but do not use force to avoid scratching the surface of the photosensitive drum.

3. Next, use absorbent cotton dipped in special photosensitive drum cleaner to wipe the surface of the photosensitive drum. Use a spiral circular motion when wiping, and wipe clean with absorbent cotton immediately after polishing.

4. After wiping, use gauze filled with talc powder to gently pat a layer of talc powder on the surface of the drum.

5. After cleaning, put the toner cartridge into the machine and close the printer cover. Then turn on the power switch of the printer to operate normally.