Brother HL-1070 - B/W Laser Printer Service Manual page 79

(3) Wipe the surface of the photosensitive drum with a cotton swab until the
dust or paper powder on the surface toner lamp comes off.
Paper path
Separator
Cleaning roller
Toner cartridge
Photo sensitive drum
Fig. 4.4
Caution: Don't wipe the surface of the photosensitive drum with something sharp. (ball-
point pen etc.)
Use the cleaning liquid which is mixed ethyl alcohol and pure water at the rate
of each 50%.
IV-15