Samsung M262x Benutzerhandbuch (en)

Cleaning the machine
3. Maintenance
Cleaning the inside
During the printing process, paper, toner, and dust particles can accumulate inside the machine. This buildup can cause print quality problems, such as toner specks 
or smearing. Cleaning the inside of the machine clears and reduces these problems.
Use a dry lint-free cloth to clean the machine.
If your machine has a power switch, turn the power switch off before cleaning the machine.
Before opening the front cover, close the output support first.