Brother Mprint MW-120 Owner's Manual page 29

Cleaning the pick-up roller
If the pick-up roller is dirty, paper may not be fed correctly.
1
Affix a piece of cellophane
tape to the pick-up roller.
2
Remove the cellophane
tape from the pick-up
roller.
→ Any dirt on the pick-up roller is removed with the tape.
Rotate the pick-up roller and repeat the procedure to clean
the entire surface of the roller.
14
Cello-
phane tape
Pick-up roller