HP LaserJet 1100 All-in-One Printer series - Manual (Page 89)

EN Cleaning the printer 79
Cleaning the printer
During the printing process, paper, toner, and dust particles can
accumulate inside the printer. Over time, this buildup can cause print
quality problems, such as toner specks or smearing. The printer has
two cleaning modes that can correct and prevent these types of
problems:
● Cleaning the toner cartridge area
● Cleaning the printer paper path