As the owner of expensive laser and inkjet printer/s, you will want to keep your machine/s in the best possible condition.
Aside from cleaning and dusting the external parts, however, you will need to take a few extra steps to maintain your printer's health.
Before plugging-in your printer, make sure to read the voltage to avoid breakdown of power supply.
Thin gauge of papers, staple wires, stickers and scotch tapes can cause paper jams and can damage some of the internal parts of the printer. To avoid this, use paper that matches the specifications of your printer. If you are using scrap or used papers, make sure to check each page to avoid rotational scratches on fuser films, breakage of separation pads, lower rollers, etc.
Gently open the door when changing toner, avoid banging or slamming down the trays or panels when opening or closing it.
Just like humans, machines need rest, too. Do not print more than its capacity. (Each printer has its own print cycle)
Ask your service center for immediate check-up/troubleshooting. Defective part/s should be replaced immediately. Otherwise, it may worsen the problem.