Muratec MFX-C2828 User's Manual Copy Operations page 216

9.3 If print quality is deteriorated
2
Release the Waste Toner Box Lock Lever, and then remove the
Waste Toner Box.
3
Slowly pull out the Printhead Cleaner toward until it stops. Next,
slowly push in the charger-cleaning tool as far as possible.
Repeat the above operations three times.
4
Securely insert the Printhead Cleaner, and install the Waste Toner Box.
5
Close the Front Door.
9
9-12